I admit, I am still fairly new to the diet, but I have never heard what you are saying. Plus, I have been a 2 meal a day person for most of my life. 1 meal between noon and 2, then one between 6 and 8 pm. I was miserable 95% of the time due to cravings. It never helped my blood sugar or my weight.
Could it be it is another of those things where it is true for some people and not for others? That is possible and could be why I have never heard about.
Now I did read about a diet called Intermittent Fasting which basically said the whole diet was simply making sure you ate everything you were going to eat in an 8 hour window and fast the rest of the 24 hour period. They gave no guidance as to what you could eat, and it said nothing about controlling cravings so I didn't dig deeper into it.
I have a hard time believing if someone chose to eat nothing but cakes and pies 8 hours a day and nothing else for 16 hours, they would lose weight. There would be enough glucose in their blood stream the body wouldn't switch over to Ketosis because it would have all that glucose ready and waiting. I would think there would have to be some sort of regulation of calorie intake involved.
RE: A beginners Guide to the Keto Diet