I missed the first half of the debate, got home in time for the second half. I think the 2nd half did not have the condescending smirk as much, so that may skew things...
From what I saw, I would say this was a draw or slight win for Biden.
Partisan dems will claim a Biden win.
Partisan reps will claim a Ryan win.
Biden was dominant in a brow beating sort of way, no class. Ryan definitely stayed composed and classy and fought hard under the brow beating pressure, but ceded way too much to Biden. When Biden called out that Romney/Ryan had no plan for X, Ryan did NOT shut that down by specifying the plans they have laid out. Or when abortion came up, Ryan did not call out that Biden voted for a Constitutional amendment to overturn RvW.
On the positive for Ryan, he was able to deliver the Romney message clearly at times. He clearly laid out Obama's broken promises, he clearly laid out that Obama doesn't have a plan. He clearly laid out that Romney has qualifications for the kinds of issues they think need to be tackled.
With as many crazy things Biden has been quoted for, I was expecting an inept bumbler. That is not the Biden I saw, I saw a wily old man who argued hard.
Ryan came off much more moderate than what he is portrayed in media. He put forth a record of both himself and Romney willing to work with Dems. I do not know how well that will play with undecideds and indies.
