Joe Biden didn't do near as poorly as Barack Obama did, but he didn't do nearly as well as Paul Ryan did.
Update, 10/12/12: Peggy Noonan was succinct as well as fair, saying, “National Democrats keep confusing strength with aggression and command
with sarcasm. Even the latter didn’t work for Mr. Biden. The things he
said had the rhythm and smirk of sarcasm without the cutting substance.”