Nice to hear someone respected confirming the energy theory. Those that say wind is earth referenced are quite correct, however the a/c total energy is an absolute, and not relative, concept which will be affected by wind. Why does airspeed fluctuate with turbulence? a/c momentum.
I particularly like the experiment where the pilot uses full throttle to prevent speed loss during the turn, but then finds that on rolling out his speed is unchanged. That's a bit like demonstrating a spin but avoiding rudder and elevator inputs to avoid entering a spin.
PS. Why do people assume that if someone is pushing a theory that they do not agree with (understand?), that person must be ignorant or uneducated (read the same threads in "flying instructors")? It's jolly rude.