Apparently, yes. Among registered voters pre-debate, Gallup showed President Obama in the lead, 50-45. After the debate, the numbers tilted back to dead even, 47-47.
Here's the kicker:
Those who viewed the debate overwhelmingly believe Romney did a better job than Obama, 72% to 20%.... Across all of the various debate-reaction polls Gallup has conducted, Romney's 52-point win is the largest Gallup has measured. The prior largest margin was 42 points for Bill Clinton over George H.W. Bush in the 1992 town hall debate.
Hat tip: The Atlantic.