The weight shift in Mindy's swing is interesting. In all swings weight must shift because you take the weight of the arms and club (at least) and move them from one side of the body to the other. I think Mindy was headed towards counter balancing this by pushing the lower body forward as the arms go back. Certainly I think this can add stability to the swing and thus aid ball striking. We need to remember too that Mindy was working at a time when all he could do was describe what he was feeling in his own swing. Certainly I can make swings that do feel minimal in weight shift.
Without wanting to raise the pressure question my own view is that Mindy was trying to describe the feel of compressing the golf ball and the notion that a square impact will give greater compression (at any speed) than a glancing blow.