Hmm... It's hard to say w/o seeing it first hand. I personally don't downhill or free ride, or at least, haven't yet. As it goes with my blur though, at higher speeds, 20+ mph (probably around 25mph avg, as recorded by my cycle computer) when I hit some rocks or some ruts, the way I can describe it is that I feel the impact but the back end doesn't bounce around. At almost every norba or WC event about 1/2 of the top 10 finisher are riding on one of our shocks or a manitou's SPV shocks which are the same thing. If there were a high speed problem, I'm sure we'd have heard about it by now. We also test with OE customers regularly, and they don't have any quams about letting us know what they think of our shocks or our company. On the dyno, our shocks have lower high speed damping numbers than most of the competition, at least in the first half of the travel anyway.. If you press the issue, and the shock is under warranty, they should accept it as a warranty return. But, that's customer service, and I don't have any authority on what goes on it that department. In theory someting could have been assembled incorrectly, in a way that's not causing a failure, but could very well be affecting your performance.