Ok, so I have only become aware of components and their differences over just a few short months. If you had asked me to tell you the difference between Sora, Tiagra, 105...etc five months ago, I would have given you a blank stare. Through reading and research I have learned at least what those supposedly in the know consider to be quality components. I read about Campy Record and Shimano Dura Ace...and that I should probably win the lottery before even thinking about such pricy gruppos. The thing is, in all the bike shops I see primarily Shimano on the road bikes and occassionally Campagnolo. I have also been reading about a really expensive new group from SRAM. I don't think I have ever seen SRAM on a road bike in any shop I have been in. So, how does it work? These companies bribe the bike companies to use their components? Is it like McDonald's serving Coke and Taco Bell serving Pepsi? Are they bought? I see some companies using both Shimano and Campy. What's the deal? Enlighten me please.