If somebody offered you a little bit more power on your tee shots and said you want to hit the ball further you want to hit the ball hard you'd probably say yes you'd probably take that. So for a lot of golfers when they stand there on the tee and they think about hitting the ball harder not softer for me than to suggest that actually you should be swinging your drives at eighty percent of your overall power would seem like a bit of a daft statement.
Why Swing A Golf Driver At 80 Percent Power (Video) - by Pete Styles