I believe they do. Ive heard extraordinary things about the new Team Orion "Alpha CRF" .21 Abi motor that was released not too long ago. They must be a hit because they are either sold out or on back order any where you go. Take a look!

http://www.amainhobbies.com/product_...ine-Turbo-Plug

That seems to be the 'bee's knee's' of motors at the moment. I do believe that's the motor that Tebo used to win the ROAR nats in truggy and in buggy. I know its the driver that makes the difference, but a reliable strong lasting motor does play a part in long A main races.