They aren't votes, but Joe Trippi tweets that

20 minutes into debate GOP online voter registration doubled above normal & still at that pace - Dem. source who monitors online.

http://hotair.com/archives/2012/10/04/george-will-romneys-bi...

Allahpundit is waiting for additional confirmation, but Trippi is a Dem. No reason for him to say so unless inevitable. The next indicator is an increase in small donations by voters.

And actually, there IS early voting in some states and Ohio specifically comes to mind. Get those votes in while the iron's hot!