Dude... I saw an SS on the showroom floor for 3 days...
NO WAY I would let anyone sit in and mess with the interior.
The sales folks kept saying how many times they had to wipe the finger prints off.
I almost had a heart attach watching one guy look under the hood with a big belt buckle on.
YOUR PAPERWORK DEFINITELY should be done by now... then it's yours and if they do talk you into keeping it you can jerk it out from under them at anytime things don't look right on one of your 1000 drive bys.
Guess they had to come clean and let you know it would be on the showroom floor since that's pretty hard to hide. Amazing they actually thought you would not question a couple extra days of prep. Good on you.
Totally up to you... might be fun to show your car off like that... just make sure it's yours first.