With apologies to my southern liberal elite friends, you are not yankees. This was pointed out to me the other day, and of course it's true...
I was hoping to find some interesting terminology applied to those southern liberals who identify with many of the political and moral "standards" thought to represent Yankee ideals, but have not managed to find any such pejoratives. Instead, I've only run across many blog entries about bitter rural Americans and a few mentions of the so-called "upland southerners".
Perhaps the most interesting article I've run across on this search was the following, on the perception of outgroups:
Scientific American article on Harvard Students and Rednecks