I don’t know DH top speed and don’t want to. I think you have to be more than a little crazy to pedal hard while riding down a mountain pass.....and he talks about being slow compared to some of the lower level pros he rides with from time to time....
Incidentally the rudeness goes both ways. He rides by all traffic laws and in appropriate lanes and has had cars try to run him off the road on multiple occasions just to see if they can make him crash
People are conditioned to watch out for the *big things* (cars), not the little things.
I had a Harley driver give me the evil eye in a parking lot last year. I almost pulled out in front of him, because I lost him in the front post of windshield. All I could do was throw up my hands and say "Sorry! Sorry!" It happens.
I have no reason to doubt your sincerity or your word but in all my years of driving the only "offense" I've ever seen by motorists against a cyclist is driving too close - and even that was unavoidable. I have never seen a motorist try to run down a bike.
On the other hand I have witnessed innumerable acts by cyclists against motorists, pedestrians, and other cyclists. Failure to yield, failure to signal, running lights and stop signs, as well as striking cars and pedestrians. I know that they are out-gunned when it comes to comparisons of sheer kinetic energy, but all the more reason to be wary instead of belligerent.