There's already a topic on this, I think. Well, at least on richest towns/cities. In that one, most people who bothered to look it up (including a poster from Massachusetts) found that the richest cities/towns, even in blue states, voted for Romney.
Shouldn't exactly surprise anyone.
You have a link to that? Thanks. My perception, is that for the Northeast, and the West Coast (outside of Orange County), the really rich precincts if with a substantial Jewish percentage, voted for Obama, if heavily Catholic voted for Romney, and otherwise in general were rather evenly split in their vote (except for rich precincts in downtown big city areas, that always vote heavily Dem).