That's true SH! Although I am actually pretty good on the descents, I prefer not to descend unless I must. We hit 56 on our tandem. Bike is solid but flopping helmets and glasses are a hint that it is just too darn fast. 46 is max on single and I have no desire to break that record. Actually when it comes to descending, a rider can easily beat another on the downhill with skill rather than speed. I've outdesended many riders on mtn switchbcks with balance and skill eventhough their max speed was much higher!
I've always figured the workout is in the climb so I usually stroll down the mtns.