Uhhhh...so I didn't expect my throw-away comment to spawn a separate thread so lemme 'splain myself. From what I can see reading BF and looking at cyclists around me, I see four quick and easily definable fashion types.
1. Fully lycra'd cyclist on a nice, clean road bike.
2. Messenger on fixie wearing shants or manpris or whatever they're called w/ a big chain around their waist.
3. Freddies w/ geek straps
4. Everyone else
Of the four above fashion categories, I would think most HS aged boys would pick messenger for the coolness factor. I'm not sure what girls would choose cuz I don't understand them at all. But if they're not actually messengers and just adopt the look, then that might classify them as hipsters/posers/wannabes/fans.
But as long as they're on a bike and not on the couch playing Socom 3, I don't care what you call them.