The JPI data proves it
That's what I love to hear. There's so much data avaliable from the good ol' days and from modern digital instruments that the OWTs and bad operating practices shouldn't stand a chance.
I'd love to get some more equipment hooked up to an aircraft, particually a rubbish little 152 or Tommy to test some of the things we're told by the flying schools. Carb heat use being one (how quickly does the exhaust manifold cool down in a glide? does it cool down? how much heat is needed from the source to provide reliable carb heat) etc.