^
True. However, it can be a bit frustrating. I race Cat 4. Not the fastest guy around, but a heck of a lot faster than my stoker, who at her current fitness would struggle to keep up with a "B" group of tourists.
Going up a hill, struggling to keep a decent pace, it can be frustrating when your stoker is chatting away, and you can't even answer back in complete sentences because you're dieing, in spite of being way more fit.
I try to console myself with the fact I'm getting a lot of work.