I am quit okay with the performance
It´s not the fatest reaction due to the fact I am working with a MACBookPro older version and 8 GByte RAM
I am in a start phase with APERTURE too. Till now I have worked only with the NIKON software, but this is very very lausy for archiving performance
D800 I like very much. It´s fast, I can adjust to all challenges, It delivers great performance and it has a flash on board also well adjustable. Performance of battery is not the very best, if you run longterm photosessions. Last but not least is a very good app for the iPhone to use is via labtop as remote screen and remote control for the camera.
Keep you posted :-))