I don't know what it is...the fact that they're in New York and have more creative-types (would be interesting too see what the USC and UCLA kids are up to.)
Sometimes all it takes though are just one or two admits to affect the creative level at the school, so that could just be it; especially as typically one class tends to build on the work of the former class.
The Famous Bernanke video
Baby got WACC
Dean Dean Baby