Even in bike shops, if you tell them thyat you commute...they look at you like its a new thing.
I think bike shops have seen this bike commute push thing and then not much become of it, so many times that they don't believe you. Like the Boy Who Cried Wolf type thing. Also a decent mechanic, after a quick examination, could proabably tell whether the bike in the last year, has been ridden or stored on the back porch, how many miles on the road or the dirt accurately even if you wash the bike right before bringing it in for a check up.
Anyway, I'm not seeing much of new bike commuters here either. Last summer I was in Chicago for a week and saw at least 100 bike commuters each day. I was impressed. And at least three street sweeping machines each day too. Inverted U racks were everywhere and I was wishing I had my bike or even a rental.