To be fair, most cars salespeople don't know much about cars in general, including the ones they're selling. I've learned to take anything they say with a grain of salt.
Indeed. I remember getting into an argument with a salesperson who bet me an entire free car that I was wrong. IIRC it was something like the car MUST have DCT because it had paddle shifters, though they'd transitioned from DCT to a ZF8. They were wrong. Huge surprise, I never got the free car.
Salespeople in general tend to not know much about what they're selling. Which is good in a way -- the idyllic psyco-product the salesperson is hawking will almost certainly be perceived as more valuable than the real thing. And any discrepancies can be handled by Engineering later on, after their commission check clears.
As long as they don't bait and switch. Minor accident damage (scratches) in the one you rest drive, major damage in "your" car they want you to drive of the lot in. Same model, switcheroo can happen easy, we are so sorry..