wannabe, I can definitely understand your desire to know the truth and have the best panel you can get. I don't think the issue with this monitor is colors, I think its that it doesn't have gamma/contrast set right, as adjusting those makes a world of difference in the color department. Hope Dell can give you a straight and correct answer. If it did somehow happen to be a 6-bit panel, well I'm curious to see what the backlash against Dell would be (I personally would be disappointed, but don't know if I'd return the monitor unless they said they would fix it and replace it free of charge).
Xatrix, no, your GT will not be able to handle games at 1920x1200. I've been using an X850XT PE with it, and things are just barely over that line where they become playable versus unplayable (due to smoothness/framerates). Granted this is with everything turned up high and with AA/AF if the game allows for it.
Well yeah, I guess if you turned things down then it would be fine on your GT, but personally, I'd rather have it run 1600x1200 or 1680x1050 and have eye candy on then run the native resolution (it scales well enough that it should look better at the lower res with the eye candy than at the higher one without).