It has promoted a rapid fire delivery with no regard to positive or negative effects of execution, nor the reaction of the attacker which may in fact negate many of the movements. People rarely stand still and let someone beat the crap out of them. However, it does look cool to the unknowledgeable, but people tend to fight back.
In fact, this has all too often been my experience with Kenpoists: Very fast hands but a tendency not to alter the technique even when it's clearly failed to work as intended. It has left me somewhat skeptical. One needs to train with partners who will make unpredictable responses!
Thanks for the reply.