One thing I immediately noticed was that I am paying more attention to holding the disc flat to the work. The grinder is being used differently and the results are much nicer than I an used to.
Yep and the bane of my existence has been trying to teach helpers to hold a flap disc flat to the face of the disc. But, since they cut faster when you use the edge, they all wind up rounded over, ruined, won't cut anything flat and the work winds up with a series of gouges from the edge of the disc.