Maybe a small one; your guess is as good as this guy’s.
But if the bounce was just minimal, you can be sure that the MSM is high-fiving itself. And they would certainly deserve a lot of credit.
Polls are especially suspect this year, IMHO, and not just for the usual reasons. This year predicting party turnout is especially difficult, and so much hinges on that. I can’t help but think Republicans will be somewhat more motivated to go to the polls than Democrats, but then again most of the Democrats I know hate the Republican Party so much that they are always strongly motivated to vote in order to make sure those evil people don’t come to power again.