Yes, I have read the reasoning behind targeted carb intake on heavy training days. I have also read that trusting the body to refill glycogen during the rest days works, too. I guess I am suspicious of the instant-gratification carb glycogen refilling as it so often seems to go along with the idea of training hard every day. Not required for longevity - perhaps I shoulda said for which goals, first.

Sorry about the shakes. I was lumping in the targeted consumption of protein also after heavy training, which seems to go along with that school of thought but which you didn't mention.