I think you can tell, even from the one to one pixel posting I made eariler there is no shimmer or sparkles in the picture.
I'm having a problem it getting 100% black in a dark room.........so the jury is still out on that one.
Also, those pictures with the white background are 100% pure white, without a hint of color (my camera, could not handle the intense white screen correctly.) Also, the skins tones in those pictures is 100% right on.......the camera was producing a slight green tint. That is true for good signals received..........if you have a below average signal, the skin tones will usually shift to green or in some cases neon.
The screen on both models 4266 and 4666 and all the 720p sets is the same