When I saw this thread it interested me immediately as I have a child who missed the cut-off date by a few weeks, but we pushed her ahead. She was just ready – socially and academically. Thank God, neither we nor she have regretted the decision. As many people have already said, it depends on the child. I’m wondering if “says who” has kids in the parsha yet (or any at all) as his/her attitude on this issue seems to me to stem from lack of experience 🙂
Just my 2 cents for what it’s worth.