In Aug 2008, the party ID was R 33.2, D 38.9
In Aug 2012, the party ID was R 37.6, D 33.3
It was that very stat from Rasmussen that got me taking a close look at polling, and particularly the internals when available.
I guess I'm not telling you anything to say that the media and their pollster accomplices have been blowing smoke up our collective skirts for some time now.