My 2 sons rode in the back seat the day we brought the car home...they are 6'2" and 5'8" and they fit...they didn't complain...
It could have been the excitement of the "new car", but I don't think they would enjoy it for any distance...

I did not buy the Camaro to be a family car...
They both drive and have their own cars, so I knew I really didn't care about the back seat...
I have not ridden in the back yet...too busy drivin' it...lol...