Interesting discussion guys.
On my end, I have visited MIT, Yale, Cornell, and Kellogg.
I did not visit GSB, because I could determine pretty quickly online that Kellogg made sense for me. GSB did not.
I will say this. I had planned on applying to MIT over Yale. But after visiting, will not apply to MIT, and will though to Yale. I wont say the reasons, other than an off handed remark that bugged me a bit. More though it has to do with how impressed I was by Yale.
In terms of student body, and the 'geekiness'. My general observations were that every student body was extremely impressive. Everyone was smart, everyone was nice, and everyone was proud of where they went to school.
I had very little negative impresssions of these schools. I mean each had their unique parts which were cool.
If I had to pick one school though, of the ones I visited which seem to be really focused on moving up in the rankings and with an action plan to do it. It is Yale. Now Kellogg obviously is doing great just as it is. But Yale, struck me quite frankly, as a school in 15 years we will be talking about as a top 7 school.