I think your impressions are generally correct, but I'll offer a couple of alternate viewpoints:
* Class size: Don't get too hung up on this. At pretty much all top schools there is a section format, in which you take all of your first-year (or first-term) classes with the same group of students. You don't get to know all of the people in your entire class, but you get to know your section-mates very well. This was my experience at Kellogg.
* Chicago: I think there may have been some slight truth to this, but not really anymore. I think that, overall, Chicago GSB students are more well-rounded than some people think.
* I know what you mean about that stereotype of HBS students/alumni, but I know a lot of HBS people who don't fit the stereotype.
Basically, some people will disagree with me, but I actually think that the people at the top programs are more similar than the stereotypes suggest. Every school has some great people, some annoying people, some brilliant people, some not-so-smart people, etc.!
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