Interesting test. Thanks for sharing. To make it even more interesting, and since noise depends on a lot of factors, it would be nice if you could shoot one with the D800 at, say ISO 12800 and one with the camera it replaces (D700) --same subject light conditions, shutter speed, lens, aperture and of course ISO. Would you by any chance happen to have access to a D700? I don't know where in the US you live. I am in the Portland area. If you are close I'd be happy to bring mine over...