From Stan Greenberg’s focus group of undecided Colorado voters, as quoted by Amy Sullivan in Time:
Even more dramatic was the shift in the voters’ personal reactions to the two candidates. Before the debate, McCain had a 48/46 favorability rating; that improved to 56/36 by the end. But that’s about where Obama started the evening—54/36. After an hour and a half, Obama’s favorability numbers were 80/14. As Joe Biden would say, let me repeat that: 80% of the undecided voters had favorable views of Obama and only 14% saw him negatively for a net rating of +66. Not even Bill Clinton got such a warm response in town hall formats.
People sure do seem to warm up to this Obama guy the more they get to know him.