If what you claim is true, why have there been other HS GOATS not coached by Brosnan? They are a bunch of HS runners so who was Brosnan coaching? A HSer that can be a great XC runner while having the top-end speed to run 4:00 has incredible natural ability and it isn’t a result of some type of brilliant coaching. Brosnan did not invent HS distance running and the talent of the twins and Aaron Sahlman is not going away under a new coach. That coach can have them run the same workouts they did last year or something similar to what other great HSers have done and they will be every bit as good.