I don't normally weigh in on this, but Rockwell is patently incorrect on several things but the most glaring to me is this comment:
"A huge defect in the 5D Mark III's AF system is that no longer can I switch among the AF modes I use with one click, without stopping or taking my eye from my subject."
It's one of the things I love about the MK3!! I actually read the manual, and if Rockwell had done the same, he'd see that he can tap the focus button on the back and the wheel near the shutter will scroll backwards and forwards through the auto focus options. No need to look away from the viewfinder.
Regardless of his thoughts, I'm loving mine. The performance is fantastic and in just a few minutes, it's set up exactly the way I want and the images are stunning.