Kirk,
It is very interesting indeed. Although, I never understood the replationship til now, I mean in terms of structure or math. I do know that even when listening to tunes I have never heard before I could anticipate the changes and direction of the tune.
This allowed me to playing something by ear along with the tune quickly, or at least on the keyboards. I wish it could happen as quick on the guitar. But the learning starts here, from the people in the know. I'll get there in time !
Plane Talk was another great invention and tool to learning.
Thanks Kirk !