Likely that camber was from the factory. Both my Vettes were set up that way when delivered. Didn't realize it until my C6 wore the insides to the cords. When I took delivery of my C7, I had them zero the camber before it left the dealership. They set camber for track use on these babies and if you track your car, the tires wear out before the camber set up catches up with you. If you don't track, you're down to the inside cords long before the rest of the tire is worn. It's not the cars fault. That warning has been discussed here on the forum for years...