The consistency of Yorktown being great will likely fall off going forward. While they still do a great job developing kids, other towns have kids being developed close to as well through various ways.
The growth of excellent town youth lacrosse programs and the proliferation of high quality club teams in the region (Express North, Primetime, Team 91, Predators, etc) has improved the quality of lacrosse overall. Rye, Bronxville, Larchmont and a few others have done a great job of growing their youth programs, bringing in excellent coaching and supporting the game in all ways. Yorktown has had a very long run of Section dominance without a great deal of resistance. We'll see if anyone can knock them off.
Great post. A good question to ask ourselves, what is Darien and New Canaan's secret? Very strong High School programs. What is setting their programs apart from the rest?