I fell for the misleading hype and bought one. I sold it shortly after and bought a 5D MK III. I know at least two other local photographers that were unhappy with theirs as well.
Well I'm in the Mt Spokane Camp, bought the D800 as my first off Canon excursion in a while (since my brief affair with Leica M9) as I thought it would work better in my Underwater Shooting after having been immensely happy with the 5DMK II, with the exception of the AF, that single centre is great, the rest a waste of space.
So, my first issue with D800 was personal, I just downright disliked the Menu set up, I worked on it as I understood after Canon Menu systems for years it would take some time to adapt, then the Camera wouldn't focus quite right, after 2 returns to Nikon Singapore and "There's nothing wrong with the Camera, it's just your technique that's at issue", we all found out about the Left/Right Nikon D800 Brain issue, returned the Camera again, returned with the same issue, eventually they replaced with a new unit, I sold it un opened.
The 5DMK III is now the replacement for the 5DMK II, which in this situation would be a fairer comparison, but only just. 36MP of the D800/800E would be more fairly compared to say the Sony a7r I would think, at least until Canon reciprocate with a medium format style body, soon I hope.
And after writing all this I agree with others, not too sure what the point is, other than I wasted 5 minutes typing this response, nothing better to do at this precise moment on a Sunday I guess.