This is a good observation, What is the rough percentage of those who don't attend MIT/Stanford/Berkeley/Harvard who have huge start-ups? Is it the same as pres

This is a good observation, What is the rough percentage of those who don't attend MIT/Stanford/Berkeley/Harvard who have huge start-ups? Is it the same as presidents not from Yale/Harvard? Major Southern musicians not from Athens,Nashville,Atlanta, New Orleans, Memphis...?