Just to keep the names, schools, and situations straight, since some of them have been talked about at length:
Potter was 1st team all-state at Mentor as a Jr., and decided to spend his Sr. year at Montverde Academy, not IMG.
Kostelac went to IMG after high school, and skipped his would-be freshman year of college.
Valentin shows he went down to IMG Acedemy when he would have been about 15 yrs. old. Can't see if he went there in lieu of a year in traditional high school, or possibly for a summer, etc.?
That is correct. Actually, my earliest memory of IMG was when I was in college in the 80's and read the now-legendary business book "What They Don't Teach At Harvard Business School", which was written by Mark McCormack, the founder of IMG. Their first sports client was actually Arnold Palmer. Nothing like starting at the top, I guess.