I'll throw a curve into this stewpot. I retired twenty years ago so this only applies (in my personal experience) to students in school in the 1980s and 1990s, but for them: a. on average the girls were WAY outdistancing the boys on discipline and decorum and depth learning --- so much so that I decided that it looked like the future of the workplace would end up with one or two old men as the directors followed by several hard-working knowledgeable women --- I nicknamed it The Harem of the Workplace. and b.) the foreign students were on average WAY outdistancing the US boys as well in all of the same traits except opening up verbally. --- my plea for intelligent immigration. Things might have changed, but that was 1980s-1990s student optics.
On the other hand, all props to ND grads generally --- never met a "bad" one. The astounding fact that almost 50% of NDs enrollees not only played High School sports BUT WERE CAPTAINS OF THOSE SPORTS shows something almost supernatural about the quality of discipline and leadership of those people entering.