I thought that the moderator, Martha Raddatz, did a great job, with pointed questions, and in controlling the flow of the debate.
Biden could have done a little less mugging while Ryan was speaking, and interrupted less often, but I thought overall he showed a much better command of the issues, and he did not let Ryan squirm out of or sidestep issues the way Obama gave Romney a free ride in the first debate.
I have to admit that I have not seen much of Paul Ryan up until now, other than sound bytes on news talk shows, but I did not think he showed great knowledge or depth on the issues, and he seemed somewhat like a college cheerleader more than a person I would entrust as the Commander in Chief should the need arise.
Ryan is definitely a better VP candidate than Sarah Palin, but I see him as just another Dan Quayle, a token for the conservative base of the Republican party, there more to be seen rather than heard.
In any case, I don't think this debate changed the way people will vote in the upcoming election, but I feel both Veep candidates up'ed the bar for the remaining two Presidential debates. Biden helped pull things back to even, and it will be up to Obama to do better, or let Romney steal the show again (since debates are often more about showmanship than leadership).
ADG