What makes them good year in and year out is the feeder system. These towns have big youth programs. Kids choose lacrosse over other sports. You dont see GC, Manhasset winning baseball championships. One of these programs no matter who was coaching would make the playoffs based on the division and schedule they play. As for other schools they have winning seasons based on the kids coming through. Every once in a while you have a good class at a school you would not expect and they have a good season or seasons until those kids graduate and then they dissappear again for years. Good luck Southside.