New to MkIII...a question for owners

I understand that when using the combo of automatic AF point selection and AI Servo the focus tracking must first start with the center AF point.

In the manual it states that when using a selected AF point and AI Servo the selected AF point will be used to begin tracking the subject. Understood.

I came across this statement on a posted MkIII guide:
One Selected Focus Point and CF-III-8 (AF point expansion)
Like with using all 45-points, initial focus must be locked in with the center focus point to tell the camera on what it should be focusing...

Is this true? I can't find anything in the manual regarding this. Frankly it does not make sense.

Cheers and thanks!

BTW, in my limited time so far with the MkIII I am finding it very responsive and tracking quite nicely.

Bueller?

I think it's a mis-wording. I know what you're talking about but the camera doesn't work that way. I think they were trying to kill two birds with one stone in that statement and it just didn't come out right.

Probably a bad translation, and referring to the center point of the group. Expansion is on, so you're actually selecting a group of points, but tracking starts with the point you select(center of the group). Just my guess.

Otherwise, you are correct. ROF (ring of fire, or all points active) AI-servo starts with THE center point, and can move anywhere in the 45 points. Selected point AF stays with that point only, or its expansion points if enabled.

I second that guess.

The new 1D Mark IV is one of two cameras right now, from Canon, that can track with all focus points and still start with any one of them.

Thanks guys...just wanted verification.