Certainly riders are talked-up, particularly in the English-speaking world, beyond their likely capability. But this seems to be a curse to the ones who are overrated.
What are they supposed to do, not take the money, when several times a month, at least ,well-known riders are killed or have their careers ruined, or at least their seasons, by training accidents and collisions? They don't know what they might be capable of until they try; I don't blame anyone for trying to step up. It seems the ego necessary for a rider to train and and put himself out there is going to think himself capable, maybe not of the highest performances tomorrow, but of being a lot better given an opportunity.
Here on this board we see the development of English, Australian, Dutch riders closely watched and hoped-for by their countrymen, always ready to get behind the next superstar. I'm an American, who has never felt that way about American riders, but it doesn't surprise or annoy me that other Americans do want the next great champion to appear.
It seems there is something melancholy about the careers of Leipheimer, Horner, Zabriskie, Danielson, Vandevelde, and a host of guys roughly their ages or a little older no longer riding. When the wonder was that an American like George Mount was riding in Europe at all, then these expectations were not waiting for every hint of promise.
Our riders have been the victims of the out-sized success of Lemond and Armstrong. Hincapie is about the only rider I can think of who's had a solid mid-level career with appropriate levels of respect.