Tee it forward only refers to your driving distance, not scoring average or hdcp. When you should "Tee it forward" essentially means that you are consistently hitting a 3-5 iron on approach shots, then you should be teeing it forward. If you are in 6-7 iron range on approach shots, then you don't need to tee it forward, regardless of your handicap. From the PGA website
Quote:
TEE IT FORWARD encourages all golfers to play the course at a length that is aligned with their average driving distance...With many more golfers hitting approach shots with 6- and 7-irons instead of hybrids and long irons, their chances for enjoyment increase.
Tee it forward is not related to handicap, but average driving distance!