There is an old joke that says that a Methodist is just a Baptist who can read, and a Presbyterian is just a Methodist with money (although that could also be an Episcopalian). Well maybe there's something to that, at least the last part. Here is a graph from the Pew Forum ranking denominations on percentage of college graduates and families with household incomes over $75,000. (click on the image to enlarge it.)
I don't think the results are totally unexpected. For those surprised by the Hindu's at the far end, this is only based on Americans. The one that surprised me was Mormons. Based on my experience in the southwest I would have expected them to be higher in both categories.