It certainly throws more variables into the mix.
The one thing that`s always outstanding for me, is thinking what the enthusiast already has in their system.
It would be interesting if they`d gone further back in the 8800a series, like the 8800Ultra, and run the tests.
I still maintain that if u already have the very old 8800Ultra, you need a good excuse, if u have the newer 8800 GT(s), you need a bit of an excuse. The excuse atm is u have money to spend for minimal fps.
If your on late 7 series, then for sure, go for it. I might also add that if your going from 20"/22" to 24"+, that might also be an excuse.