I feel lucky like Helene, although I was the one that complained; I *can* ride as fast as we were going on Sunday, but left to my own devices, I don't. But once in awhile, I yell at DH "Do you know how fast you are going?" When he has GPS set on a course, I don't think he has speed set on his screen. I need to go very slowly in the beginning of a ride... it's the same every time. This is why on group rides, I often am doing well, when others are fading, because they went all out in the beginning and I didn't, as well as the fact that many rides are in the area I live in, and they have no idea what climbs are coming.
I'd rather die than ride a tandem with DH. I complain like i did once in awhile, but generally, he pushes me because he knows I can do it, yet he is content to ride at my speed most of the time. I would be scared to death to not be in control and I just don't like the idea of behind "behind" someone while screaming down a hill.