Biden and Ryan: Substance and Style

The instant polls show a split decision, and both parties are predictably divided about last night's vice-presidential debate. Democrats are saying Joe Biden re-energized their party. Republicans say Paul Ryan more than held his own during his first time on a very big stage. Did Biden interrupt too much and come off as disrespectful? Did Ryan get swamped by the onslaught and get lost in wonkish details? Will this change the campaign momentum by the time the President and Mitt Romney confront each other again on Tuesday?