When I speak about "sophisticated doping" I face the opinion of a lot of people here, thinking that everybody is doped, "but they know how avoid to be caught.
Hmm, never heard of Lance Armstrong ?".
This is a common idea, and frankly is to compare gold and wood.
I don't have anything to say about athletes caught for doping : for me, they must be banned forever, AFTER BEING SURE OF THEIR FAULT.
I don't know in Kenya any manager who hopes to evolve an athlete from 1'45" to 1'41". We can see the talent of athletes when they are still beginners, and we (coaches) can say to the managers how to develop athletes. And I can assure you that, the first time I saw Rudisha (I was with brother Colm), immediately I thought "this guy can become the new WR holder", but every time I saw the other Kenyan I never had the same idea.
You can't "buy" the top talent needed for these performances using doping.
Talent is something depending on morphology, physiology, mental power, discipline, and, least but not last, level of intelligence.
An athlete like Eliud Kipchoge is a phenomen because has big talent, but his main talent is his brain. He is more professional than all the other Kenyan athletes at the moment, as in the past Haile, Kenenisa or Shaheen were different kinds of persons, with a total focus in their athletic job.
You have a very wrong idea about the qualities needed for becoming an absolute "star" in middle and long distances. These events are totally different from the events where muscle power, reactivity and technique are the base of qualities. Here we need to have a very high threshold of pain and fatigue, and this is possible only when pain and fatigue are part of the normal life.
So, the first quality a top coach goes to investigate, when wants to produce an athlete of world class, is the mentality. Is this athlete able to suffer enough ? Can he have continuity in training ? Can he have the right discipline ? Can (at the end) have the right level of EDUCATION for following the advices of expert coaches, not only for their training, but for their life too ?
Put in your mind that we speak about athletes around 18-20 years, in many cases with low level of education, and we must be, before coaches, teachers. Somebody follows, and can become a champion ; somebody else wants to go for his own way, looking at managers and coach like people able to create for them some income only, and these are the losers.
The example of Jama is a very bad example, because everything was only focusing at the results, without any ethic and without any teachment.
But the athletes with a "coach/teacher" are clean 100%, because we continue to educate young and best athletes that their strength comes from the qualities I named above, and not from external aids.
So, don't mix everything. I don't think all US students are killers using guns in the University, and at the same time I don't hide myself behind a finger.
But, you can believe or not, I perfectly know what I'm speaking about.