interesting that many of the best marathoners started running very late:Paul Tergat@19(and no to school running), Japhet Kosgei 20s, some other kenyan sub 2:10 marathoner who started running in his late 20s cause his doctor told him to do some sport against overweight and heart problems, Edith Masai,....seems like running superhighmileage in HS is not the missing link.