My instant take on the debate:
Sarah Palin did not offer specifics, did not reassure those who have questions about her readiness, and most importantly did not defend John McCain (other than repeatedly calling him a "maverick"), nor did she make a case for how she or McCain will deliver the change this country needs.
More importantly, Joe Biden turned in a performance of a lifetime. And he was on offense all night, focusing on John McCain. He was direct, and honest -- ironically, the straight talk all came from him. He talked about change, and he was credible.
Bottom-line: Sarah Palin did not have a calamitous moment, but if the question is who made a better case for change, Joe Biden clearly won.