DFC,
I don't think MJ is disputung that rudder can and should be used to prevent yaw. He referred to FL trained pilots among others and the common patter in the states for a long time was and possibly still is "rudder to pick up the wing". This led to an exercise called oscillatory stalling where bootfulls of rudder were used to pick up one wing and then the other. AAIB Bulletin 3/2006 refers.
Here's another one though.
When I did my own AFI course I was taught to teach S & L by demonstrating what S & L was, give the a/c back to the stude not S & L and out of trim, and ask him to regain S &L and retrim the a/c. That would get me fired from my present job.
My first CFI who was also my AFI insructor also used to insist that the only checkpoints which could be used on a nav leg were 1/4, 1/2, and 3/4 waypoints - even if there wasn't a feature there !