"A clear win for Biden will arrest some of the positive momentum that the Republican ticket of Romney and Ryan is enjoying right now." 

'Much of the impact will be in and through the media. If Biden is able to emerge with a victory, it will calm down some of the hyperventilating among liberals who have engaged in an Andrew Sullivan-led freakout for much of the past week, following President Obama's weak debate performance in Denver.''

''How much a Biden win would impact actual voters would depend on how resoundingly he beat Ryan -- which would in turn dictate the degree to which the media emphasized a possible shift in momentum -- and on how many people tuned in. Biden's debate with former Alaska Gov. Sarah Palin (R) four years ago was watched by 70 million people -- as many as watched Romney and Obama last week, but the 2008 viewership shattered records for vice presidential debates." 

IMO, the turnout for this one will strong, people want to see how Sarah Palin-in-Pants does against the Old Pro .