I think heartsonfire is right on about these guys aren't being overtrained or overraced. I believe the Baylor guys only double in 4×4. Although, Mike makes the interesting point about the lack of complete a complete sprinter coming from a tempo program. Wariner tried this year, and he did alright at the 200m, but that may be because he has as the name of this thread mentions, great natural maximal velocity. However, when you look at LSU of the past 2 years you find the all-around sprinter.
The ultimate testing and proving ground for this is not the collegiate ranks, but the high school ranks. With the education level and philosophies of many HS coaches, tempo based programs will not produce great results in HS, because of overracing and overtraining. When a coach 4 events an athlete at a worthless tuesday dual and says he's training thru the meets for friday night/saturday's bug invite. He's fooling himself. When he's having his kids run 8x200m @ 28s, he's using Hart's method, but he's not applying it to the level of his own athletes, that 8×200 should be 30-31s for most HS boys. That extra intensity is huge, that's about 20m difference for 2-3s difference. So you have compounded most likely at least a 200, 2 400's on most of your best sprinters at a dual meet with 1-2 days of tempo that is approaching special endurance I intensity with shorter rest. Would it not be better to do a short speed day on moday, 2 100m's and a 200m on the dual night, and do a speed-endurance session the next day, then 6×200 @ 28-29s on the day before the meet.
My thoughts are this, I experienced greater success with females last year focusing on speed and acceleration development 20-60, I worked tempo 1x a week in feb and march then 1x every other week till 2 weeks before our HS sectional. Monday was always a speed day, if we had a tuesday dual we used that as a speed-endurance/special endurance type day, wednesdays were either tempo, special endurance, speed, or a technical/race modelling day, and thursday were ext tempo of 6x100m with 4-6 min rest @16-17s. The results were significant, tied the school 4×1 record, first time the school ever had 3 13.0s or better 100m runners, the 3rd fastest 4×2 in school history, and 5 girls under 8s for 55m. This is for a small medium sized school of 600 kids in illinois. Another important factor not specifically related to running as training, was the increased emphasis in the weight room.