No, national poll averages aren't as important as the state-by-state averages, other than as a predictor of the popular vote, but I thought it was worth noting that the president has almost entirely regained his pre-first-debate average per TPM's Polltracker. The only difference is that Romney's polling surge slightly before but mainly after the first debate was enough to tighten the race. All of that said, Romney had a terrible day of polling yesterday and I suspect his numbers will continue to deteriorate.
State polling from late Wednesday via Taegan:
Colorado: Obama 50%, Romney 47% (We Ask America)
Colorado: Romney 46%, Obama 45% (Reuters/Ipsos)
Ohio: Obama 50%, Romney 45% (Quinnipiac)
Ohio: Obama 50%, Romney 45% (Public Policy Polling)
Ohio: Obama 48%, Romney 46% (University of Cincinnati)
Ohio: Obama 48%, Romney 45% (Reuters/Ipsos)
Florida: Obama 48%, Romney 47% (Quinnipiac)
Florida: Obama 47%, Romney 47% (Reuters/Ipsos)
Iowa: Obama 50%, Romney 45% (Public Policy Polling)
North Carolina: Obama 49%, Romney 49% (Public Policy Polling)
Virginia: Obama 49%, Romney 47% (Quinnipiac)
Virginia: Obama 48%, Romney 46% (Reuters/Ipsos)