Yes, there has been a bit of a swing.
Recalling that the same pollster had iirc that other dude at +3, we seem to have a 5 point swing with time to go.
It was a well-done convention.
Most speakers were at the top of their form. I write this as a supporter of another party. The contrast with that other dude could not be sharper.
In addition, in several states that may be close, Republicans lost ballot access challenges to third party candidates. The Republicans lost their challenge to Virgil Goode in Virginia. They withdrew their suit against Gary Johnson in Ohio.
Recalling that the polls have been more favorable for Obama than the approval ratings, on might expect polling above 50 in the foreseeable future, perhaps, and that other dude polling down nearer the big four-zero.
7:14 AM PT: Rasmussen actually saw that other dude at +4, so this is a six point swing.