I know of at least two that are planning to go. Interestingly enough the World Series of Youth Lacrosse uses a different age requirement that allows older boys to play. They do no use the US Lacrosse 9/1 cut off as you may expect. Just got this right off their website today. I know of some local Philly clubs that below date makes a huge difference and results in all players being eligible.

All players must be born on or after 5/1/2002. Each player will be required to submit a copy of their birth certificate.