MICHAEL BARONE: “The instant polls: CNBC had it Ryan 56%-36%, CBS Biden 50%-31%, CNN Ryan 48%-44%, AP Ryan 51%-43%. Not nearly as one-sided as the instant responses to the first presidential debate in Denver. My sense: Biden pumped up partisan Democrats, but failed to win over the voters who are taking a serious look at Romney at a point when he is up in national polls.”

UPDATE: Barone’s AP poll quote may be based on a false tweet.