GM Authority site said 40% of C7's are 7MT
http://www.motorauthority.com/news/1...ck-with-manual
General Motors has confirmed to Edmunds that 40 percent of Corvette Stingray buyers choose the seven-speed manual transmission option. The other 60 percent of Corvette buyers get a six-speed automatic with paddle shifters, although GeneralMotors Company [NYSE:GM] will introduce a new eight-speed auto next year.