When looking at the DLPs in Best Buy from a distance of around 9 feet for the 56" TVs, I'm not sure if what I'm seeing is the so called screen door effect. What I'm seeing is sort of a graininess over bright spots of whatever picture is on the screen. For example, if the video is of the inside of a house and you see a bright blue window, there's sort of a dusty, grainy look to the bright blue sky in the window. I see it on all the DLPs. Is that what they call the screen door effect?