From my more humble vantage point it's been incredibly damaging. He has no social life outside of his career ( basically the people living the same lifestyle) and has been molded to be single mindedly focused on his studies. He's honestly in most ways has because a more dull individual.
(This is kinda funny b/c they were sorta conceived to emulate Oxford and Cambridge - which as I understand are all about he well-rounded "liberal arts eduction")
However that being said, it's hard to argue with the fact that all his colleagues and all the people he meets are incredibly intelligent/hard-working and he in effect has access to the best minds in the world. The fact he is so "networked" mean ofcourse he will always have a very well paying job, and most likely will eventually be in a position of power.
EDIT: A corollary would be that if young Jack Ma went to Harvard, he wouldn't have become current Jack Ma, and would probably be another wealthy lawyer or something