> I am no less groggy in the morning. (No alarm means I wake up at 4AM or after 11 hours.) I am no more energetic. I sleep about the same number of hours as I did otherwise. Generally speaking, I noticed no physiological changes other than (a) craving sugar and (b) losing weight (due to cutting out alcohol and related foods).

For what it's worth, I have the same anecdote. I don't see any dramatic difference. Same with avoiding caffeine and I normally drink a lot of tea and coffee.