While Rojo's article was primarily about Hall, it struck me as somewhat defeatist- that he felt the difference a good coach makes would only make a 9:10 high school two miler competitive with a 9:00 runner, and therefore Cornell can never truly contend at the NCAAs.
I disagree on several levels. First of all, it is not absolutely clear what level of talent a guy has on day 1. In other words, it is not cut in stone that certain guys have obvious limits. Some guys develop faster or slower than others. Some thrive on lower mileage and some on higher.Some guys have trained much harder in hs than others.
Secondly, anecdotal and empirical evidence is that some 4:15 hs milers do not improve much, and some 4:20 guys break 4:00. In those cases, it is often a difference in coaching.
My own experience as both coach and athlete suggest that a good coach can take a guy stuck at 4:00 (1500) down to 3:50. And a guy stuck at 3:50 down to 3:44-45. So that is much better than the 1 sec per lap.
At 5k, guys get stuck at 14:30-14:40 that could run 14:00.
I don't have any marathon experience, but I do believe that a 2:13 guy with average training could run 2:06 with excellent training
Cmon Rojo-think big!