Yep. I got the call today as well. Personally I think GM uses it as a way for the salesman to show that he is looking after you.. You see the info is in the owners manual as well. Did they also remind you to activate your OnStar. I have also had a call from the Service manager to congratulate me on my purchase.
Don't get me wrong its great and this is the type of thing that happened at my Harley Dealership as well. They looked after us extremely well in every way. It would seem that GM has ramped things up for Vette owners as well.
Did I mention how much I love our new car.