I don't know... I suppose that's based on my assumptions. I consider a "cyclist" to be like a "runner"... if I see someone running to catch a bus I wouldn't say that person is a runner. If I see someone in running attire (running shoes, athletic attire), then I'd say that person is a runner. So I guess I'm using the same criteria to define a "cyclist" -- one who rides a bike for fitness. However (I'm thinking this through now...), that eliminates commuters. Generally people don't jog to work, but they do cycle to work. OK then, they're cyclists!