How knowledgeable are hi fi sales staff overall?

I've been frequenting various hi fi shops recently, looking for ways to improve my audio chain. Been chatting with the sales staff, asking questions.

What strikes me is the discrepancy I've been hearing from various 'experts'. Often times, what one sales guy claims is being denied by another sales guy (in a different shop, of course).

That made me wonder -- how competent overall are those sales guys? Do they know (are the expected to know) a lot of facts, or are they just expected to bullshit their clientele?

Dip in and out HERE