I don't know how that question can be answered, but I can give you some information about Kevin Sullivan's training, which he shared on another site. He posted the details of 9 "typical" training weeks scattered throughout the year. First of all, the mileage seemed fairly high for an MD runner (I didn't total all the weeks - there was one low one, coming off a two week rest period, and the rest all struck me as being in the 80-90 mpw range, and he mentioned he does get over 100 on occasion - although maybe someone else can give more precise details on that).
IQ100 wrote: How many examples of runners that DON`T DO THE LONG RUN BUT THEY HAVE MAJOR SUCCESS ?
Anyway, the longest runs in those weeks were:
9 miles (this was the first week after a rest period)
15 (and another run of 11)
15 (+ 11)
15 (+ 13)
14 (+ 11)
14 (+ 10)
So Sully does long runs. Not 20 milers, but fairly long runs nonetheless, ~ 90 minutes or so, each week throughout most of the year.
Note - I'm not trying to link his training to Lydiard principles - just sharing relevant data. You can use it as you wish in the debate.