Your son demonstrate typical characters of M students. He is normal, just his ability grows out of what parents and his high school can provide for him.
He needs more challenges and peers.
His asking "why" is a sign of a "gifted kid".
M is really a great college for these kinds of children, They live very happily there and somehow grow up to be confident, capable, caring, and thoughtful young men.
I have some observations over IVYs and M. Students do turn out to be a little different. M seems to be more caring than IVYs.