My scores suffer terribly from longer tees.
When I play from the whites at my home course (6000 yards), I may hit a 4 hybrid and a 6 iron in on a few holes. The majority of the holes it is 9 iron or less though. My skill level drops off considerably around the 6/7 iron range. If I play from longer tees, I will be hitting 6/7 iron or longer on most of the holes. I don't feel my game translates to longer tees at all.