Interesting tidbit from the LA Times poll...
link

The voters who watched the debate were slightly more favorable to Kerry than the overall electorate even before the encounter began, the poll showed. For instance, in lastweek's Times Poll, Kerry trailed Bush among all registered voters by 49 percent to 45 percent.

But the voters who watched the matchup preferred Kerry by 48 percent to 47 percent for Bush even before the debate. After the debate, viewers divided almost exactly the same way, with 49 percent favoring Kerry, 47 percent Bush.

Which is another way of saying that Bush voters tend to be more ignorant of what Kerry actually says and what his positions are.

That's not surprising- dittoheads and Faux News watchers are among the least informed elements of the electorate.