The reason is possibly ex-demonstrator or ex-rental fleet sales. I don't hear of private buyers rejecting S3s. Very little feedback. There's nothing adverse apart from very light steering. Better to go for smaller wheels with deeper profile tyres for better steering feel and ride quality - do not be misled into specifying 19-inch or 20-inch wheels. You're paying money for status, but a lot less money than for a Range Rover Evoque that's about the same size.