I received my balls last wek and place with them for 36 holes.  The distance with the driver isaabout 10 yards longer.  However, the distance with my irons was amzing.  I was hitting the ball more than 8 yards longer.  I had to adjust my use of clubs to ensure I hit distance I wanted.  These are going to be a great asset when they are available to the general public.  Titleist are great.