Thanks for the article. It is always good for me to learn that I am not the only person following a strange diet.
Currently, my intermittent-fasting window is from 11 am through 7 pm. Which is easy to follow when I am on my own. The only reason to eat outside of that window is to fit in better with society :)
Now, I can go to sleep at 10:30PM and wake up at 6:00 AM without any alarm clock, refreshed and recharged.
I noticed the same thing; your sleep improves quite a lot when you do intermittent fasting.
Your article inspired me to try a smaller window. I will probably change to six hours.