Talley wrote in post #18178449
I honestly think they didn't change anything on the AF module. The wider range is due to the mirror redesign allowing the points to be spread vertically and I think the biggest gains we are seeing is just the AF module having a faster processor behind pushing the poop out of it.
This seems a very strange statement coming from someone who themselves has posted about the improvements in AF tech with the 5D4?
There is a lot of technical data, and our own experimenting on this forum, including yours, (number of AF points we can use @ f/8, speed of AF with T-Cons, dual pixel AF, etc.) that would rule out the only difference being a mirror change and processor speed. Much more fine tuning appears to have gone into the entire system. This is the 1Dx2 AF system, which really is a different animal form the one in the 1Dx and 5D3.