Thought this was interesting... I looked up the club teams who made it to 2007 US Youth National Championships last year, U-15 to U-17 boys (Yes, I was bored) Anyway, 2/3's of all teams who made it are now playing Academy and 2/3's of the crowned National Champs are also in the Academy.
I only searched the ages who would now be playing U-16 & U-18.
The other 1/3 happened to be from Texas & Arizona, which may not make alot of sense for them since they have plenty of talent right in their back yard.