I wonder which of the Vegas store is unionized (is that the word)?
In my experience, GC is nothing out of the ordinary when it comes to music stores. I've seen as bad and even worst in smaller local music shops everywhere I've lived - and the worst I've had the displeasure to deal with were way beyond anything I've encountered at CG.
I've also seen stores where you had the weirdest mix of helpful and knowledgeable clerks and the most indifferent, arrogant pricks in the same department.
The weirdest I've seen was this local store were the clerks were all borderline useless but who hired those girls you'd expect to see behind the counter in a wild night clubs to work the cash register. I guess they thought that this would give you a reason to come back and spend more $.