Given the amount of disagreement, I'd expect it is common enough but with some multimodal distribution tied to culture, geography or job type, so that the two modes don't notice each other. Happens with lots of stuff. My N=1 is that I probably know fewer people who skip breakfast (to include calories in coffee) than I do people who do 20:4 fasting. I like how I felt on 20:4 but it is easy to fall off of for social reasons, and womce I do, the blood sugar related cravings come back so I need a 48H water fast to get back into effortless 20:4.
