I have an MKS and love and I am under 50. I can't count the number of teenagers mostly girls that have come up to and say, "sir, nice car". All my friends that I hang out with are under fifty and love the car. So, I am not sure who he is speaking for. Of course these are anecdotal and I have not even mentioned the number of thums up I get. He just needs to back this up with data or actually look at the demographic that currently drives these cars and get their opinions rather than make things up.
I went to Miami to car wash and th owner got his wife on the phone because now he wants to trade in his Lexus for one of these. Heis under 50. I have many more stories and can speak from what I have actually experienced.