This is not surprising to me a graduate of a school with a similar profile to Duke. The student body is composed of highly wealthy domestic students but also insanely wealthy international student body.
I vividly recall every fall the crazy number of wrecks by fresh students after "Daddy gave me a Maserati" with no idea how to drive it -- always asian. And then in the spring a couple of the poorest international students would commit suicide when they flunked out and all their families savings back home were forfeit on the tuition.
Didn't have time to juggle craigslist no-shows and stuff. Wasn't worth the $150.