After two Bush campaigns it was nice to see two well-spoken candidates talk about subjects they have some interest in and knowledge of. It seemed like a pretty even match, as far as explaining their disagreements (and agreements). I do think Obama did quite a bit of damage to McCain on Afghanistan and Pakistan, where it sounded like he has a plan that he's confidence in. McCain sounded like he just wanted to undermine that and... move on.
Not that Obama did a bangup job throughout--I just watched Joe Biden not stumble through the tactical vs. strategic question about the surge and pound McCain on the economy. Obama didn't drive in every nail, and I don't know that he "won," but he didn't lose, which might be winning, if that makes sense. He seemed calm and studied, and given the times and the past few years I think it's secretly a huge advantage.
Apparently the immediate spin from the Republicans is that Obama agreed too much with McCain. I think they're playing themselves. I think it helps Obama, because he didn't look like he was just out for blood.
I do think McCain--the sneer, the pissed-off laugh, the unwillingness to look at Obama--came across as an asshole, especially on the split screen.
I don't know if that'll help him or not. Seriously.