I too am a little confused by what Mr. Asbell is saying. For me it is a simple push and pull, what I mean is that I always push the pressure point on the grip to the target throughout the shot. This prevents what I call, "negative tension", meaning a dead shot, dead release, or just a pull with no push. I think people get confused because it is a gentle push, not an agressive one, or hard one.
I can tell when I am losing it, because my shots will drift left and right.