Girl's summer hockey birthyear?

[coachdevelopment]

Has anyone heard if most summer programs are going to single birthyear for girl's next summer?

[observer]

Organizations moved to that model in the last few years so they don't have to find 5-6-7 new players each season as some of the players become to old. Pick a single birthyear team and keep them together for 3-4 years. One idea has them playing open division the first year of the new level and then moving to invite level the second year.

It makes a lot of sense to do summer hockey as the boys have with single birthyear as the number of girls that can play at a high level is growing really fast.