Happened to me 3 times in a 9 hole round less than an hour ago, and it seems to be random, but it does happen most on specific holes. Beth Page #4, Beth Page #9, and...let me go check my notes.
Flyindoc is accurate in that it's not only perception and resultant of conditions (i.e. elevated tees/greens, specific wind direction or strength etc,). It happens under perfect conditions and under less than perfect conditions. If there isn't a forced carry, then there's not much of a negative because the total distance is almost the same, but if you NEED the carry it becomes a huge issue. With the level of play, I often MUST make that carry or lose the hole and when I do everything I'm supposed to do correctly and lose the hole because it ended up in a bunker (or worse yet the 50%+ rough right around some of the bunkers) that's BS.
I was playing with a guy that used the R9 driver and he had a higher trajectory than I did several times with my R11.