Research Provided by Sheldon Shealer from ESPN (4/25/12):

1,119 players have joined NCAA Division I programs in the most recent signing period (80+ colleges have yet to confirm their signings)
111 were transfers from another college program
47 were international players coming to the U.S.
961 true high school seniors moved on to college soccer
495 played in the U.S. Soccer Development Academy
466 are non-Academy high school seniors
44 percent of all of the most recent NCAA Division I signings played in the U.S. Soccer Development Academy
NOTES: It is possible that some players listed as Academy players no longer play in the Academy and some listed as non-Academy now play in the Academy. The listing club is identified as the club a player represented when he committed. However, that said, these numbers should be very accurate considering every player who has dropped from the Academy has been replaced by a former non-Academy player. International players are players with no U.S. ties. International players who attend U.S. high schools and/or play for U.S. club teams are factored into the Academy vs. non-Academy lists.