The obama camp saw what happened last night and they're not going to let that happen again. Biden is going to be in some major debate prep over the next week.
This is what I'm thinking. Republicans are setting expectations for Biden so low, he can't possibly do as bad as expected. All he has to do is not bomb.
Both of these are very legitimate and reasonable comments (and as many on here know, I have been a Romney supporter since the day he announced here in NH in June of 2011).
Part of Biden's appeal to those who support him is his blue-collar background and his constant reminders to the voters that he is one of them. This goes off very well. Biden's campaign appearances tend to take place in "working towns" and Democratic strongholds. (In contrast to Obama, who prefers appearances on college and high school campuses, as well as urban settings.)
Against many of the one-time "candidates" to be Romney's running-mate, Biden's tough, blue-collar persona might have been surprising effective in a debate setting.
The down side for Biden is that Ryan too comes from a working-class family and town and can match Biden story-for story in the "just folks" category, neutralizing Biden's primary vote-getting strength.
I don't think it will be the blowout that many on here are predicting, but rather a solid and effective, though non-spectacular, "win". Which is all he will need to keep the ticket's momentum going.