It seems to be a trait with Music Shops in general, the staff (particularly in the guitar/bass dept) are arrogant, rude, and take great delight in belittling all customers who dare to ask questions!
I recall my first ever venture into a guitar shop in Stevenage back in 1983 where the guitar guy with long blonde locks made me feel so stupid (I was selecting my first guitar) I almost left in tears (I was 14) strangely many years later I returned to the shop to discover the same ass was still there, I took great delight in asking him some of the most complex questions I could think of, and reveled in his folically challenged head!
Why do they do it?