As I just said in another thread: and folks around here who work in game retail wonder why they are so hated.
I used to work in retail, and maybe I was just weird, but I took the time to:
A) do the homework and know what I was talking about
B) develop people skills which not only made me approachable, but made me a better sales person in the end
C) freely admitted that I didn't know about something and didn't have to resort to lies and tall tales.
And maybe I feel this way since I'm most familiar with them, but I've found that 90% of the clerks at EB and Gamestops to be the most obnoxious, rudest, laziest folks on earth. No offense to those around here who work in said places; I'll take you're word for it that you're not as bad as the rest. But this shit about salespeople being so ignorant is hardly surprising.
Like any job, there's a certain degree of responsibility, especially when you deal with the public. You can all laugh at that if you want, but it's the bottom line truth.