Fellas,
Maybe i can add a little to this discussion as I did a month training at altitude in Addis a short time prior to his marathon debut in London.
I ran with Haile and the Ethiopian group (inc. NYC winner Tesfaye Jifar and Tesfaye Tola, Olympic Bronze medallist) on several occasions and chatted with Haile several times as well. I only did recovery runs with Haile and the group because they were too quick for me to keep up on workouts.
My observation would be that the 'laufen mit Haile...' OVERestimates Haile's total workload in terms of quality for sure and probably overestimates quantity too. I doubt he runs more than 130miles per week.
When i was there Haile ran 3 hard sessions per week - one track of the 1200 type described, a long tempo of about 20k run hard, and a long run of maybe 35k run hard.
Most of Haile's other running is very slow...but it is at 8000ft plus and on hilly terrain so those conditions are probably more significant stimulus than pace.
Haile ran 13x per week but i doubt it would be a specific or quantifiable as outlined in 'laufen mit Haile...' not least because few of the routes they run were or even are measurable. They run up and down mountain sides on very rough terrain much of the time so pace varies hugely thorughout any one run.
Typically Haile's main session is run in the morning, be that the workout for the day or the longest run of the day if it's a recovery day. The guys get up and run dead early, say 6am, because their farming background means that is the kind of hour they always wake. The AM run on an easy day was between 1hr - 1hr30 and the length over an hour seemed more to depend on if the guys had found a nice route and were enjoying their chat rather than aimed at hitting a pre-planned distance.
This relaxed approach was reflected in most of the Ethiopian training: They ran really hard during hard workouts and very easily on recovery runs. (For example we did one afternoon run of 31mins on the flat that was not even 4miles and that's not a typo because the pace was about 10mins per mile that day, almost walking.)
20mins before that 4mile easy run Haile and Jifar were eating fries in the cafe while laughing and joking. It was striking how, in contrast to European and American runners who are generally preoccupied and anal about exact splits, pace and distance, the Ethiopians just ran hard or easy and often.
At this point Haile reckoned he could run close to the World Half Marathon record - he had won the World Half in Bristol in 60.03 a few months before i was in Addis - and when i was there Haile said to me he was looking at race options to do so (although none turned out to be available).
And, by the way, I don't think Haile's on drugs. Haile's mechanics and ability and training venue and lifestyle are all waaaaaaayyyyy better than mine and i've run 28mins-odd for a track 10000m , so i don't find it hard to believe that Haile can run a good 2mins faster for 10k than i can without him needing drugs to do so.
Finally, i just remembered, as we finished one run there was one of the young Ethiopian guys standing on the other side of the road about to go training. Haile said to me, 'you see him, he's good'. He was pointing at the at-that-point unheralded Kenenisa Bekele...