If the election were held today, the President would win on the strength of picking up Ohio, and then possible Virginia.
People who don't look at the cross-tabs of a poll are stupid. The Gallup "Likely Voter" model shows a 61-38 margin for Romney in the south. But it shows a 52-48 advantage for the President in the north and in the east.
Romney is racking up huge margins in red states while he remains behind the President in key swing states such as Nevada, Wisconsin, Iowa, and Ohio.
So yes, it's a nice poll for Romney at the moment, but it's also the biggest outlier of a poll among all the national polls at the moment, coming the day after the President got his mojo back after a lackluster first debate.
I imagine by the weekend, the Gallup poll (which mostly consists of polling done from last week and into the weekend) will start to look like 49-48 again.