The sales staff doesn't get any proprietary information any sooner than the word on the net.
I would have to agree that most of the sales person(s) really have had very limited information regarding anything of substance about any of the sports cars that I have owned.
Many sales people lend their opinions about break in, oil changes, etc... with no basis for their belief.
Personally, I love it when one tells me that the break in really isn't necessary. Yeah right, brother, I'm gonna break in my new exotic, high HP engine the way YOU tell me too, rather than what the Bavarian engineers suggest.