For the benefit of those who are having trouble connecting to the DXO results, or who are not familiar with the site, I'll provide a brief summary of what I've found so far.
(1) The D800 pixel has very similar performance to the D7000 pixel in terms of SNR at 18% grey (skin tones), Dynamic Range, Tonal Range, and Color Sensitivity, as predicted and as assumed in my arguments relating to my D7000 images above.
At equal print size, the D800 is of course better in all parameters.
(2) Compared with the D3s at equal print size, the D3s still retains the low-noise-at-high-ISO title. Above ISO 1600, the D3s has better DR by amounts ranging from 0.4EV to almost 1EV at ISO 12,800 and 25,600, at equal print size.
However, the 0.4EV DR advantage of the D3s at ISO 3200 and 6400 is not nearly as significant as the 2 &1/3rd stop DR advantage of the D800 at its base ISO of 100, compared with the DR of the D3s at its base of ISO 200.
(3) At equal print size, the D800 outstrips the D700 in every respect. SNR is over one stop better at base ISO, and about one stop better at ISO 12,800 and 25,600.