Originally Posted by Brian Ratliff

Close. But not a categorical rejection at all.

I just think the large number subtraction problem will make the testing extremely difficult to control. 300W (+-2%) in, minus 298W (+-2%) out equals... what? Unless you have a serious effort at calibration, you can get anything from 13W loss to 10W gain through the drivetrain. You'd have to spend a lot of time convincing me of your calibration technique to make any experimental numbers make sense. You would probably have to spend a lot of time with your powermeter on an independent dynamometer.

Nobody's convinced me they've taken their experimental method seriously. They think they can just slap a powermeter onto two different frames and come up with numbers that mean stuff. I don't think they can because they haven't displayed any knowledge of the testing problems with their method.