I am relieved to see other parents being apprehensive about this as well!! I didn't accelerate either of my children, against the school's recommendation. For my 8-year old, he was emotionally immature, and can be a follower, so we opted to have him stay with kids his age and it has worked out wonderfully. I have a 5-year old who the school tried to do early admission last year, and I think in the short-term, it would have been better. She is currently so far ahead of other kids, and is not connecting with them socially, whereas she has always connected well with older kids. We chose not to accelerate her though because while every elementary school teacher we talked to recommended it, ALL middle school/high school teachers stated that it was detrimental socially at that age. So we are still not sure how it is working out for her. Her teacher also does not differentiate her work, whereas my son's does.