How does that back up any argument that the 660 Ti is on par with the 7950? 3 different overclocked cards can't even win in two TWIMTBP games vs the 7870.
1) your first graph is taken from Just Cause 2 using full 8xAA and 16xAF. It's pretty well known that the GTX660Ti slows down with those features turned on, simply because of memory bandwith. Turn them off (like many, many gamers do) and the 660Ti will soar past the 7870 and even beat out the 7950 at times.
2) Dirt Showdown is a game that has been optimised for AMD graphics cards. AMD worked with the developers, and it was designed almost as a showcase for AMD. It has impeccable Eyefinity experiences, and works better on any AMD card than just about any other game. I wouldn't exactly call it a reputable benchmark for that reason.
3) Batman Arkham City is basically a wash. The framerates for ALL cards are so close it really doesn't make a difference, and doesn't prove anything. And, once again, all AA is turned on full, providing a slight advantage to the AMD cards. Throw a GTX670/680 in there and see what happens. They will run away with it.
Face it, Nvidia has winners with ALL the kepler cards. And the GTX660Ti is just another example of it. That's not to say that AMD's efforts aren't relevant, or even a good option. It's just that the new GTX6xx series seem to be a little better. And I'm saying that with my feet firmly in the AMD camp. I've been running various AMD cards (and processors) for the last 10 years, ever since the original Athlon and ATI X800 days.
Eyefinity, you need to give respect where it's due, and stop arguing inane points with cherrypicked arguments.