Add 1.5 to remove the partisan lean for those two.
I'd put the overall lead at 6-7% having looked at the numbers.
But this overall number is not nearly as important as the numbers in the toss-up states. And those were almost all Dem-leaning before the conferences. Especially when you sanitise the numbers (removing useless partisans like Gravis and Purple Strategies).
Ohio
http://elections.huffingtonpost.com/pollster/2012-ohio-president-romney-vs-obama?gem#!hiddenpollsters=gravis-marketing,purple-strategies
Florida
http://elections.huffingtonpost.com/pollster/2012-florida-president-romney-vs-obama?gem#!hiddenpollsters=gravis-marketing,purple-strategies