Well a friend was in town to shoot the JazzFest. I am just drooling at some of the photos he shot. He had a D800 and moved around the Fest very fast, lots of enourmous crowds. He brought his photos to dump to a drive in Raw mode. I have a Weibetek that can do a lot of drives, do I was able to dump and put on a drive for him. I am not permitted to upload, but he and I were amazed at the quality and just how sharp all were. It was fast enought for him. His buddy was using a Mark III and I also helped him. My quick compare was that the Nikon D800 was sharper. I have asked him to let me upload and with permission in a day or so I will send the Springsteen group that he shot. I am just dreaming of when my D800 will arrive. Just totally blown away here. He also took a lot of night stuff in the Quarter and they are all great. I think he is uploading them in a few days and will place a link to his site also. My impression is that the Nikon focuses faster and more accurately.