That matches our experience.
When the timeshare sellers say stuff we know is not exactly right or even flat-out wrong, we no longer dispute them or try to set'm straight, because that only prolongs the encounter.
We have learned it's best just to sit there quietly & politely, paying attention, not saying much of anything, occasionally nodding our heads (with a slight rolling motion added), & saying No Thanks when the moment of truth finally arrives.
The only time I can recall when a timeshare seller gave up on us early was when we had recently purchased a $750
tiger trader South African timeshare, which we had used for exchange into the timeshare where we were getting the hard-sell that ended early. We mentioned that to the timeshare seller, saying we found about South African
tiger traders via TUG. She said she could tell that we were not going to buy -- & asked for the URL for TUG. Beside that, we had been "pre-gifted" (her term) with discount Disney tickets, & we already knew what the units were like because we were staying in 1, so she said there was no point in going any further with the presentation.
That was in 2003. We figured we were golden on freebie timeshare tours from then on. But it has not worked out that way at all. The timeshare sellers pretty much give us the whole 9 yards every time. So it goes.
-- Alan Cole, McLean (Fairfax County), Virginia, USA.