I have 42 300's and 13 800's since 1976.  Have never topped 300 rpms, and was usually closer to 250.  Prior to the introduction of the resin ball in 1992, I think lower rev guys were at a disadvantage for 300's.  Not the case in the resin era. 

Actually, the big thing I have seen over the years is a proliferation of 300's accompanied by less than stellar series.  There was a time when it was almost unheard of to see a 300 game without a 700 series.  Today not so much.  The reason is the resin balls are a double edged sword.  The can destroy the pins, but they also blow up the lane pattern so fast that staying on the shot is much more difficult than it was in the polyester or urethane eras.  I would say that in at least 10 of the 300 games I have shot in the resin era, I moved once or twice during the course of the game, in anticipation of the lane transition.  Never had that happen prior to resin.  I once shot a 300 out of the gate in a four game league, and only had once double and didn't crack 200 the rest of the night.  That is extreme.  At the other end of the spectrum I have seen guys shoot 300 after a brutally difficult pattern opens up over the course of 5 or 6 games. 

No matter how you slice it the pocket is tougher to stay in over the course of a couple of games today, even on house shots, than it was pre resin.