I was after the noise when comparing pixel with pixel, not sure if you consider that to be the same resolution or not - eg. a crop of the D800 compared with the full frame of the D300.
If that chart means that a crop of a D800 picture at ISO3200 will look identical to a D300 at ISO800, then that is really quite impressive, and all I need to do is find one for sale now. I see that several Hong Kong traders are claiming to have them in stock, and come with "UK warranties", but would much prefer to purchase from a UK vendor.