HRE, of course I work with some of the best athletes. However, I can't accept your idea (and may be it was also Lydiard's idea) that nobody (or evrybody, that is the same...) can coach a Kenyan.
When I went Kenya the first time, in 1998, I was the Technical Scientific Director of Italian Federation. I went Kenya because the Italian runners were no more able to win medals, after a period with Olympic Champions (Cova, Dorio, Bordin), World Champions (still Cova, Panetta and Baldini in HM), European Champions (Ortis, Cova, Mei, Antibo, Panetta, Lambruschini, Bordin, Benvenuti, Baldini) and a lot of medal of different colours (Curatolo, Ferrara, Viceconte in Marathon W, Pizzolato, Poli in Marathon M, Viali and D'Urso (800), Di Napoli (1500 and Gold in Wordl indoor in 3000m), Brunet (5000 W), Carosi (steeple) and of sure I forget somebody.
But I was already the Lecturer of IAAF going for courses with African coaches, so I decided to study what really the African athletes used in training.
Immediately when I arrived in Kenya, I started working with 3 different types of athletes :
a) Athletes already in top 10 in the World. I integrated their training, and I looked for their improvement (or not, depending on the planned training)
b) Athletes with high potentiality, but in a decresing phase
c) New athletes, starting without any idea of training.
In the first group I had, in 1999, Paul Kosgei (already World Junior Record Holder of steeple) : I discovered he could be better in long distances. However, he improved his time in steeple, won a medal in Cross Country (short distance) and still has the best time in a heat in WCh.
I had Kennedy Kimwetich in 800m : he improved from 1'46"2 to 1'43"03, and the next year ran 2'13"49 in 1000m.
I had Wilson Boit Kipketer, and he won silver medals both in WCh and OG 2000m.
I had David Lelei, and he improved his times to 3'31"36 in 1500 and 1'43"97 in 800m.
In the second group, I had Christopher Koskei. In 1998, he ran 8'48" and was practically at the end of the career. With new and more specific system, he became the only Kenyan winner of Gold in WCh 1999, bettering his PB in steeple.
In the third group, I had two new athletes : John Korir, that in 2000 was in the Olympic Team in 10000m while junior, and Robert Kipchumba, winner of both Cross and 10000m juniores in WCh 2000, while only 16 (officially, really 18), and I had the Ugandan Dorcus Inzikuru, that won WJCh in 5000m beating Defar.
So, the only way I could control if a more scientific plan could work, was to see if the athletes with my training could improve ; if somebody n. 10 in the World could become number 5 or better ; if a young athletes could beat the other Kenyan and Ethiopian of the same age.
Saying that everybody can coach a Kenyan is a very big stupidity. Of course, everybody can FISH a good Kenyan able to beat the European of today or the New Zealanders of today ALSO WITHOUT COACH. But for beating the other Kenyans or Ethiopians, you need a good training plan, able to make the difference.
For almost 20 years, Ethiopians were very much stronger than Kenyans in 5000 / 10000m BECAUSE THEI TRAINING PLAN WAS VERY MUCH BETTER. Don't think the reason is the top talent of Haile and Kenenisa only : THEIR TRAINING WAS VERY MUCH MORE MODERN THAT THE TRAINING OF KENYANS.
About the fact you are sure I can't claim good results with Italian, I ask you to speak about whay you know, and not about what you don't know. May be you forget Italian won 2 Olympic Titles in Marathon between 1988 and 2004, and Italy was the only Country able to do it. The coach of Bordin and Baldini was Luciano Gigliotti, but we worked always together in the National Center in Tirrenia, studying the reaction of the athletes, investigating the effects on their body, discussing after experimenting different types of training, using at the same time scientific knowledge and practice. Luciano was a Master and a teacher for me, and, most important, an elder brother that gave me part of his practic approach with the athletes. He was a great coach, and his successes were not inferior than the successes of Lydiard.
When we speak specifically about Marathon, sorry to say Lydiard was not a model for anyone of the best. Never he had a great marathon runner in his group, instead he had great middle distance runners. So, if you think Lydiard is known as the fundator of "marathon training", having success in 800 (Snell), 1500 (still Snell, Walker, Quax and Dixon), some in 5000 (still Quax), 10000m (Halberg), and NOTHING IN MARATHON, this seems a little bit strange : or not ?
About the athletes Slow Fat Master speaks about, he was a 34 years old workers in school, one session per day, 30'20" of PB in 10000m, able running in 2:11:22 in marathon. I had from Italian Marathon runners results as 2:08:51 - 2:09:07 - 2:10:20 and a lot of 2:11 with athletes with very little talent. With women, the Italian Record Holder (Maura Viceconte, 2:23:47) not able running under 10:00in 3000m when 24, Ornella Ferrara (bronze in WCh 1995), Maria Curatolo (silver in ECh 1994), and many athletes under 2:30 when that time was something important. As National Responsible I won the World Marathon Cup with women in 1985 (Hiroshima), with men in 1987 (Seoul) and 1995 (Athens), against Countries following Lydiard (like Japan) or with athletes able to train alone (Kenya and Ethiopia).
So, if it's true that without talent nobody can become a Champion, it's also true talent is not enough withou a good training plan, and all the results of the "self made men" of the past (like my friend Hodgie-san) could be very much better, if they could channel their right mentality in a modern type of training.
The real difference between Lydiard and Igloi, for example, is that Lydiard wrote some book and was of English mother tongue, and Igloi was Hungarian. But their influence in the history of methodology really was the same, such as Van Aaken or Gerschler or Reindell. And, of course, every coach has learnt something from everybody of these MASTERS of methodology. But, I repeat, what we can do today is something different from what they did 40-50 years ago (and the improvement of times clearly shows this situation).