The moderator made a big difference, asking specifics and keeping some control while allowing the candidates to speak. Good job there.
Thought Biden did a good job at debunking false statements and showed his prowess on foreign policy. His experience and personal involvement through his career came through. He may have overstepped in the interruptions, but was not as obnoxious about it as Romney in the first debate. His laughing was a bit distracting but made his point that the conservative approach is laughable and he backed it up. If the question was, "Who can step up to be president if need be?', he would get the nod.
Ryan could not really come up with an answer about why the rich need to keep the Bush tax cuts, when we all know they and corporations are sitting on piles of money and hiring no one.
Overall, I would give it to Biden, but the real test will come in the presidential debates to come. Hope Obama shows up.