Reading Seth's Blog today, something came to mind. I suspect that if using science, we ever measured the effect of game improvement clubs on people's actual golf scores, there would be almost zero correlation (and a billion dollar industry would be at risk)
I have a 20 year old putter that putts very well, if I play a lot and practice a lot. If I don't, it doesn't. I'm not sure that any "elimination of skid" or starting the ball rolling quicker or "moment of inertia" will help, nor will a carbon water bottle holder on my bike if I'm fifty pounds overweight.