The idea of a bike shop having an attitude isn't new. To me, this parallels the same stereotype that surrounds comic book shop owners. The condescending attitude is basically this: "If you're not one of us then what the hell are you doing here?" It's a ridiculous attitude that immediately pushes new customers out the door.
Just like the comic book industry, the bicycling industry is full of newbies, people who are relatively new to the industry and need help navigating the landscape. The absolute worst thing you can do is alienate anyone new and make them feel inferior to those who are already in the know.
I'm very fortunate in that I have never received service from anyone at a bicycle shop that I would think of as being condescending. The shop I first started going to had wonderful people running it. In fact, an experience that this shop is what led to the name of my blog. If the bike shop hadn't shut down I likely would still be going there.
My current shop is even better than the previous one. Every employee there is always happy to help you. And there isn't a hint of attitude in anyone there. Everyone is welcoming and eager to help you in every way. Which is exactly how it should be.