I had a similar experience back in June with RVW. I sent them my PDI list and they said they work with their own list, which they eventually provided to me.
What actually happens is that they have a tech guy do the PDI when the unit comes in and they will likely have a sales guy walk you through it when you pick it up. This is what they did with us.
In our case, they told us to take our time as long as we wanted and also to go over it as best we can before, during and after the walk-through and to note (they have a form for this) any thing amiss. They then go ahead and fix it right there and you sign off on it that they fixed everything that was found during the walk through. We were there for about 2-3 hours, also had a hitch installed there and bought some stuff for it from their parts shop.
In retrospect it was a decent procedure although the young sales guy doing the walk through knew far less about the trailer then I did... I did so much research I actually showed him some stuff, and this is my first trailer.
I think that the PDI they did was decent if not perfect. May give them some slack for being a volume mover. All in all it was a positive experience and the most important part is that you finish the day with your new camper!!