Good Article about the 1D Mark III's AF
You can read the PDF here:
I've said it before; I use a 1D3 as my main camera for everything. I do primarily weddings and landscape and it has never let me down. The only thing I want on the camera is a VGA LCD and a 2nd joystick for AF point selection when shooting vertical. That's it….
I know a VGA screen doesn't improve a photograph and whatever, but when you're shooting an 85L @ f/1.2 hand held, sometimes it's nice to be able to check critical focus.