And I'm sorry but "MUH LOW BLACK TURNOUT" is getting really old. You are assuming that the black voters that don't vote as often are as democratic as the ones that did, and while that may have been true in the past, it may not be anymore. In fact, there was a poster here(I can't recall the name) who said one of the reasons the polling may have underestimated D's is because it OVERESTIMATED voter turnout. Many low propensity R voters may have said they were going to vote but were not passionate enough to actually do so when election day came.
I have no doubt that lower propensity black voters are less Democratic than their high propensity counterparts. I also have no doubt that they are overwhelmingly Democratic, especially in Louisiana, and that they tend to drop off sooner than white voters. QED