The debate was the 4th most tweeted telecast in history, behind the MTV Video Music Awards, the Grammy Awards and the Super Bowl.
There were more than 47-thousand tweets declaring Romney the winner, and fewer than 30-thousand for President Obama.
But was the win enough to convince undecided voters to join the Romney camp?
The debate was certainly a big hit on Twitter, but we won't have any real idea how convinced undecided voters were, one way or the other, until polls come out in a couple days.
But a lot hinges on what they finally decide.
We watched the debate with six people in the FOX 10 conference room, lit in bipartisan red and blue.
Two members of our panel have not made up their minds. And after 90 minutes of back and forth, they're still undecided.
"These two guys talked in circles all night. I believe they are out of touch, both of them are," says Tim Brewer, an undecided voter.
Rachele Plowman kind of liked the president.
"I like the way President Obama talks more to the American people, I only heard Romney speak to the American people once and that was the end," says Plowman.
The political pros who joined us split along party lines. Democrats like the president, republicans were for Governor Romney.
"I frankly thought Romney did a nice job of laying out the difference between him and Barack Obama on the nature of the federal government," says Wes Gullett, Republican consultant.
"I think Obama did a good job," says Sophie O'Keefe-Zelman, Democratic consultant. "Laying out some details of what was done in the last four years and what will be done in the next four years."
After the debate, everyone's searching for the winner. It may have been Twitter.
After the Sesame Street character Big Bird was threatened with de-funding by Governor Romney, "Save Big Bird" tweets were everywhere.
That could turn out to be one of the big takeaways from Obama versus Romney round one -- Big Bird a trending top on Twitter all day today.
How about Google? The four most-searched terms during the debate were "Big Bird," "Simpson Bowles," the deficit reduction commission in Washington, "Dodd-Frank," the law regulating Wall Street, and "who is winning the debate."