Nope, you misread. I guaranteed you could not move each side of the rear triangle the same amount off of center by flexing it apart by hand. And I stand by that. I wouldn't have responded at all if you had not used the term "it's 2mm on each side" in an earlier post. That misconception bugs me, it simply does not happen. By flexing the frame apart by hand and stuffing a wider hub into the frame, you change the alignment of the frame, at least a little, in every case.

Experience tells me it's most often 4mm (or however much you widen the spacing) on one side, zero on the other. It can vary. But it will not be equal amounts on each side, I guarantee you.