An update on my previous post: several readers noticed that Shinji Watanabe’s flickr stream (NSFW) contains at least one image without EXIF data with a maximum/original resolution of 7360 x 4912 (just like those D800 samples):
Note that some of the images were taken with a Hasselblad H3D-39 that can go “only” up to 5412 x 7212. The image in question has a resolution of 7360 x 4912.
I bet that some of those were taken with a Nikon D800 camera.
I also bet that they will be removed in 3, 2, 1…