RAND has an interesting tracking poll (American Life Panel) which interviews the same 3500 people (1/7 each day) repeatedly over the course of several months.  

The significance of this methodology is that shifts you see are due to real people changing their minds.

So it's interesting to see that since the debate, the Republicans in their study are less inclined to vote (by about 1%), while the Democrats seem more inclined to vote (by about 0.5%).  This is a real shift of real people's stated intentions, but the sample includes last Tuesday through yesterday, so it's not a pure take on the debate reaction.