I'm convinced that the bar has been lowered so much, that Palin's mere recitations of talking points will be hailed by the talking heads as a 'victory'.
The first and third Presidential debates allow for two minute answers with 5 minutes of discussion for each question.
But the VP debate has shorted answers to 90 seconds with discussion of each question limited to two minutes. This is much more sound-bite friendly.
So I think when it's all said and done, it will be deemed a success.