I think that the interesting part about the SC Dem primary is that although the popular news media has been almost exclusively framing the democrat primary as a race/gender contest, in SC Obama was favored by every single demographic except the elderly.
It's also funny that although Bill Clinton has been severely chastized by the press for pointing out the idiocy behind the media's fixation on the race and gender of the candidates, he was also spot-on in his criticism. Yea the Clinton campaign has been playing up the race/gender issue a bit, but the media has fixated on it to the point where they are not only excluding any discussion about actual issues, they are also openly insulting the public by directly stating over and over that voters have no choice but to make their decision based purely on race and gender.
It's nearly impossible to find any media discussion about the issues, and that is one huge reason why Edwards and Ron Paul have had such a tough time getting any coverage... They're not black enough, old enough, religious enough, or female enough to attract the media's attention. They've made the hideous mistake of actually trying to discuss issues that really matter, and the media is punishing them by ignoring them almost completely except when one of the other campaigns finds something non-relevant but juicy to talk about.