Did you read the manual?
Apparently the AF points are lens dependent and specified by group.
24-105 F/4 = Group C
24-70 F/2.8 = Group B
70-200 F/2.8 II = Group A
Most primes = Group A
Does this imply we have to adjust the focus style based upon the lens?
That's a major usability issue if true
OK, after re-reading it I think it just tells you what AF points are available with a given lens.
Curious why the 24-105 they bundled as a kit lens does not have the Dual Cross type AF points, which are superior?
I actually have so many +1's or +2's in this thread that I wanted to quote but chose this as I discovered this fact tonight after getting the camera today. I haven't loaded any images yet onto my comp to check the sharpness but something seemed off til I read the manual about the AF mode (coming from a 20D, I have SOOOO much reading to do now, I realize ><) but caught the Spot Focus mode and it seemed to help a bit with the focusing. Sad that the 24-105 is in Group C and not at least B, which I was really hoping for since I central focus almost exclusively but I'll see how things go in time. I do plan to eventually go for a 24-70 2.8 but that's in a few years. Also weird to see is that they didn't list the version II of the lens.. which puzzles me because it was announced before the Mark III (I think...) and so you'd think they would know which category it falls in. Oh well- time will tell. Time to go read me a manual before falling asleep!
The reason the 24-105 is in Group C is that it's f/4 not f/2.8. The dual cross points down the center line require f/2.8 as the as narrowest aperture to work. I believe they become normal cross type points since those operate up to f/5.6 I believe.
Totally agree with everyone else, the number of AF points is astounding, and in my brief usage so far, it usually picks the point(s) that I don't want it to focus on. I'm probably going to be using expanded or surround mode, but I'm going to have to start getting really quick about switching AF point areas because I'm so used to the 5d2 where I only use the center + recompose.