I'm a little sad that this is considered a gender issue. I realize that girls and boys often develop differently, but ALL children develop differently. Isn't that why we guide our children as individuals?
Actually, it really upsets me. As the mother of two boys, I've heard since they were born that they would be slower than girls to do just about everything--talk, use the potty, read . . . I never believed it--and it has never turned out to be true. I am surprised that so many people just seem to naturally accept this.
FWIW, I have a July boy who started kind. at 5. He is almost always the youngest in his class, and always the smallest. He's in 5th grade now and is way above grade level in academics and seems happy enough. I volunteer in the classrooms at school and see NO correlation between age and academic abilty or social adjustment. There are plenty of "old girls" who struggle and plenty of "young boys" who shine. Maybe it will be different in later grades, I can't say, but it can't be as simple as holding all boys back . . .