If this is
something that occurs at most stations, then it's extremely
unprofessional on the part of the ExpressJet employees. It seems that while they're probably the best regional airline in the United States, they can't handle competition from another carrier.
I've noticed, though, at least from what I've read here, that it's limited to the employees who don't seem capable of realizing that CO
bringing in another Express carrier means that ExpressJet is no longer dependent on a single major airline (with the introduction of DL
Connection flights out of LAX
, although the flying is being done at-risk) and that they're now out making a name for themselves on largely ignored/underserved niche routes throughout the country, all of which would probably have never happened had CO
not brought Chautauqua in.