I'm absolutely happy with my D800 and D800e, I read the technical guide from Nikon before purchase, so I was kind of "prepared" for difficulties with this upgrade from my D200 and D700.
But basically I have had far less problems than I feared for
I have learned that the shutter speed is an issue, especially when I shoot motor sports (e.g. motorcycle race). I used to get more keepers from my D700 & 500/F4 (monopod), I now have to use a faster shutter speed from 1/250-1/320 to 1/320-1/500, I see about the same pattern is true for my 70-200/2.8 (hand held), I needed a faster shutter speed to make sharp images. Even though, after 6000-7000 shots, I still get less keepers than before. Perhaps more practise next year will allow for 1/320-1/400.
I do need these slow shutter speeds to get the "right" dynamic in the image, so it's a real challenge to get the speed just right and still make sharp images.
3 times the reciprocal of the focal length is a bit dramatic and it wont work for my photos. Thinking it must be a "magic" number to make sure that any user will get sharp images - However I think it might be worth giving that a "free" try, before claiming the camera to be faulty.