I think you are under estimating the ineptitude of the SA's
My SA was pretty bad, and my DA was even worse... had to go to that dumb Q@#$'s supervisor in order to get my car.
Keith
I hate lumping any group of people together and applying subjective feelings to them, but with that being said, tesla salespeople are not much different than any other car salespeople. In general, people selling cars know less than the people buying said car, and thats still the case.
I am still holding out hope that this is telephone game, and they told this OPs friend that "you have a different battery" and the OPs friend assumed "different" ment LFE. I dont think the LFE batteries put out enough power in that form factor to be used in a performance model Y or 3.
If tesla actually is putting LFE batteries in the perfomance variants that would be huge news (but I dont think this is true). I said what I think this is, that they are using the 77kW batteries in some cars vs the 82kW batteries, but in most of these reported cases they have told the people (and offered a discount).
There is something missing in this story, but since its "OPs friend" and not OP themselves, its also possible the OPs friend glossed over the fact that they got a discount for buying that version of the model YP.
Tesla being tesla, its also possible that they didnt.
None of us were there for the discussion, so we dont know what was said, but I feel comfortable saying that there is no way that is actually a LFE battery in that car no matter what the OPs friend was told. It is the same battery that was in the 2020 Model Y perforamance.