I got 90+ FPS with SLI 480's in l4D2 (maxed settings) and eliminated the crosstalk by changing the settings. By default the CT is terrible, but it was easily fixable. I didn't try anything but console games+movies with 2D-3D conversion and saw horrible CT ghosting.
I noticed the low res (streching 960x1080) but thought this was normal. That explains why KZ3 looked so terrible, it probably runs @640x360 stretched
Now I'm glad I returned it. The 27" is nice but the Asus VG236H should offer identical 2D PQ+ better 3D for 200$+ less.
When i first started the tridef software it asked me if i wanted to run frame-sequential (full resolution, every 2nd frame is for every second eye in full resolution, just like 3dvision) - AMD 5000 card or greater. I hoped my gf card would count as "greater" It didnt, discrimination.
All other graphics cards: 3d side by side. (960*1080 stretched, looks like crap rendered, just fine for movies).
To test 3d properly on this screen i think you need an AMD gfx card. If you plan on keeping the 480's and 3d gaming is a priority for you, i strongly agree you should return this for the moment. Maybe tridef will sort frame-sequential for nvidia as well in the future but that wont do you any good right now. Id suggest you borrow an amd card for your review, if you want it to be properly done.
If what i suspect about high fps eliminating crosstalk with the 2d->3d conversion is true, it definitly agrees with your findings of crosstalk in console games´and movies, as both have very low fps.
As i said, i got crosstalk in series/movies, especially when panning but really nice quality in calm scenes, but no crosstalk at all in hours of lfd or wow with 120+ fps. Iguess both wow instances and lfd2 are quite dark, maybe thats the best possible circumstances.. ill try something bright and see too tomorrow.
The console game you tried probably ran in @640x720, if 1280x720 is the full resolution. It only needs to stretch one side. (alternatively 1280*360 if it did top/bottom).