Biden came across very well, and in a sense I suppose he won.
I was glad to see Biden go strongly after Palin's ridiculous "maverick" talk. There needs to be a lot more of that.
The downside is that Palin's ratings were falling precipitously over the last few days, as she was ever more widely regarded as a joke. She held her own in the debate, so unfortunately I think some people will reevaluate their reevaluation of her.
The aw-shucks manner she displayed is offensive to anyone of intelligence, but it will go over well with those who are not bright enough to recognize that leading a country requires some depth and intelligence. It worked well for Reagan after all.