This only works if you can compare a rich kid and a regular kid who had the same opportunities, particularly educational but also in terms of their friends, etc. Otherwise there's no control. Presumably, we spend all this money on education so that it results in more success for the same amount of work later in life.
One thing I've noticed, anecdotally: kids who grew up in Manhattan have parents or know parents who were investment bankers, corporate lawyers, etc. This gives them a leg up in getting into those professions over kids whose parents were in more common occupations, if only because they know more about those industries. It has nothing to do with their attitude. I'm guessing that it's no coincidence that lots of successful actors and musicians have successful actor parents, too: Charlie Sheen, anyone?
One thing I've noticed, anecdotally: kids who grew up in Manhattan have parents or know parents who were investment bankers, corporate lawyers, etc. This gives them a leg up in getting into those professions over kids whose parents were in more common occupations, if only because they know more about those industries. It has nothing to do with their attitude. I'm guessing that it's no coincidence that lots of successful actors and musicians have successful actor parents, too: Charlie Sheen, anyone?