Now... why would you shoot at 1/640th of a second, ISO3200, when you're only at 70mm on a full-frame body? You'd be getting such a higher quality exposure at 1/160th, ISO800 or even 1/80th ISO400 if you're confident in your hand-holding technique.
Because I was playing with it! Geeesh! There was two of us at the wedding (wedding was of a friends son) so I wasn't being paid and got the "unusual" shots for it. I also only had the camera for 18 hours so I got to play like crazy. One doesn't get that chance at a real "event" too often!
I have been ripping though my gamut of what this D800 can do and I am actually just chuckling at the "reviews" and how people put so much emphasis on them. Allow me to point out one thing about the trusted review sites. They shoot RAW and to be able to have a base line, they turn every setting off or just use the defaults that the came comes with. Supposedly that is so they can do 1 to 1 comparisons with the D700, Canon and the like. The problem is, that none of us shoot with the default settings, and different manufactures (cough cough Canon) ups the NR in defaults. Nikon has always gone more detail vs NR.
Here is a novel idea, instead of down sampling the D800 files, Up-sample the D700, 7000, etc. and see what you get. We all crop our images, which makes noise more noticeable. To me up-sampling makes since.
Now I'm not going to touch the D3s/D4 with any comparisons. The D800 is a whole new class of FX camera in my mind. Nikon now has dedicated FX cameras directed toward specific uses - not just the all-in-one.
Low light - better than every Nikon BUT the D3s & D4 by at least a stop and easily 2-3 stops more detail & better color in high ISO than previous Nikons (excl D3s/D4). Better metering, AF, more accurate exposure... blows my mind. We all apply NR to every image, and with these files, the detail remains even with NR to the max in LR4. D700 files with that much at 3200+, they look more like a Monet.
Real world and not a set test, I would take the D800 over the D700 in every situation. Except for maybe sky diving - it would be cheaper to loose a D700 in that case.
Sorry to all D700, D7000, and film lovers, it will be hard to justify to yourself that you don't want one. In my mind - this camera kicks those body's a$$es! :)