I think before generalizing about kids who are accelerated, it's important to understand what actual research shows. In A Nation Deceived, there were only minor social setbacks acknowledge by kids who were grade accelerated. There is no way to know if they would have had social issues no matter what, simply by being very advanced and feeling disconnected from agemates.
My own son is accelerated one year based on a very high Iowa Acceleration Scale score. With his agemates, he was sad, detached and had a hard time making friends. They did not understand him, didn't read the books he read, play the games he played or connect with him.
In his "new" grade, he has good friends, plays well with others and actually gets in trouble sometimes for talking in class. (We quietly applaud this when he's not listening!) He is an inch taller than the next tallest kid in his class and is often mistaken for kids two or three years older than him.
If it weren't for the birthday chart on the wall, nobody would know he was a year to a year and a half younger than everyone else in class.
I personally know 4 people with kids that are currently accelerated and several with kids who have now graduated college. While none of them say middle school was easy, none of them would change a thing about being skipped.
