This is a significant new paper from USTA development. October 2010. It says some of the things people on this forum talk about, and it could be a good discussion starter.
Patrick McEnroe, General Manager of USTA Player Development, has said that “Ninety-nine percent of junior players should aspire to play collegiate varsity tennis. Only the truly exceptional should be planning to proceed directly from the ranks of junior tennis to the world of professional tennis.”
The USTA’s player development pathway now proceeds from junior tennis, to collegiate tennis, and beyond.