CBS couldn’t gather an audience of truly undecided voters; the ones they found leaned to Obama. But they liked Biden’s answers better than Palin, most dramatically on the war in Iraq. Biden’s “we’re getting out of Iraq scored 70; Palin’s “white flag of surrender” scored 35.
In a separate sample of 500 undecideds watching at home, 46% thought Biden won, 23% thought Palin won. 18% went from “uncommitted” to supporting Obama; 10% to McCain.
CNN shows Biden winning in a focus group and a sample of all viewers (51-36).