I tried that setting in increments of 10 from 0-100 and it didn't seem to have any effect.
Funny thing is if i route east/west the diff pair will not gather at 45 from the pads. (first pic)
If I route north/south the diff pair will gather at 45 from the pads for a short distance although
it does not center the pair between pads, it snaps to grid from the control trace. (second pic)