The review of the Canon EOS 6D has been completed over at DPReview. They seem to be fairly positive about it, maybe less so than I am. I think the camera is great with terrific IQ. However, they did notice the same thing that I did, the battery drain with wifi and GPS turned on is quite significant, so be sure to buy an extra battery if you don’t have one.
I also don’t miss the autofocus system of the 5D Mark III when I’m using the EOS 6D, 95% of the time I find I don’t need anything beyond the center AF point. However, this point is personal preference and you may decide you need more cross-type AF points.
“If you’re an EOS shooter eyeing the 6D as a more affordable alternative to the 5D Mark III, even as a second backup body, Canon has made your decision fairly straightforward. Still image quality aside, the concessions you’re forced to make for the significant cost savings are substantial. A slower burst rate, less sophisticated AF system with smaller coverage area, and moiré-prone video headline the list of compromises. And while we can understand Canon’s desire to keep the camera’s price down, other seemingly arbitrary decisions, like the inability to save HDR raw images and a DOF preview button whose location is much less useful than it could be, smack solely of product differentiation…..”