Last year a few yellow jackets also went to Yale on first day. Good for them.
Look at the commitments over the last 4-5 years, you will see a trend of more and more kids choosing Yale, Harvard, UPenn, Princeton, Stanford, Brown, etc…. People starting to recognize the rest of these kids lives is much more important than the 4 years they spend playing lacrosse!
Were you borne yesterday? Do you really think that kids and parents have only started to realize the benefits of attending one of those schools over the last 4 or 5 years? There are no more kids going to those schools now than there were in the past.
By the way, the schools that you listed are not for everyone, not every student athlete has the grades to get into those schools.