If you call 1/3 of the time "consistantly."
There are two things going on with me. First, because I'm not doing it consistantly with mids, I'm doing it even less consistantly with fairway and distance drivers. I can get a rip like that (380'-400' with a Gazelle) about 1/5 of the time and a rip like that with an Avenger (400'-420') 1/10 of the time. It gets less and less frequent the faster the disc. However, if I get my Pro Orc or Champ Wraith turned over on a distacne line I can get >400' most of the time.
Second, I choose to throw slower distance drivers for the extra control. I could throw a Star Destroyer and maybe get 10' more than an Avenger, but I'd have less control of where it goes probably negating any distance gain I may have seen. With the Avenger I can hit the upper end of what I can do with my slower fairway drivers easier and on a lower line. You actually get a stronger rip with narrower rimmed discs.
All I'm saying is that there's nothing saying that faster = better. Just because you can throw something faster doesn't mean it's necessarily the best disc for you.