Sounds like another unfounded claim to me. My experience had been that the particular type of tee has no impact on my ball flight, only the height of the tee really impacts this. I wish changing the tee would give an extra 10% distance; if so, sign me up! Unfortunately, after trying to change everything around (clubs, balls, tees, ball markers, hats, underwear, etc.) it always comes back to the only thing that truly impacts my ball flight materially is my swing!