Continuing on my own post from earlier, I'm often surprised by how little discussion there is about the Republican Brain Drain. It is a real phenomenon that few here seemed to have been interested exploring outside broad, sweeping comments about how stupid Republicans are, and so forth.
Here is an article from David Frum's website in the 2010 election cycle that does some pretty deep analysis.
The article notes that Republicans still do above average with college educated people in general, but that the trends become alarming when you begin to segregate "college" in any great degree; the better the schools get, the
increasingly likely they are to be liberal. Further, it provides evidence that this was not always the case; as recently as Eisenhowever, Ivy League colleges were majoratively Republican. A relevant quotation: