After attending a demo day at my home club I purchased a new 913 D2 driver, I have played 6 rounds with it now, and I cannot say I see any real difference in distance, however I will say I have seen a major difference in dispersion on mis-hits and it is all good.5 to 6 strokes a round on 14 means a lot and that is what I credit my driver with. Thank you Titleist.