Most people really do eat more than they say they do. This is because they eat more than they think they do. A package of food will say it has a certain number of servings in it, but most people would just go ahead and eat the whole thing all at once and think it was just one serving. In a way they are both right. I was reading a news article a couple years ago about some consumer activist group that wanted portion sizes (and calories) updated on food packages to reflect what most people actually ate as a single serving rather than what nutritionists recommend.

I did that "not eating breakfast" and "felt fine all day" thing for a while, because I didn't wake up in time to eat before work and didn't bring lunch with me. And even though I "felt fine all day" I was often more irritable with people than I should have been. Then I didn't know why I was eating so much in the evening. So don't necessarily believe people who say they can make it work.

The last person I knew who said to me that he only eats once a day was a coworker. He just lost his job, not for bad performance, but for being difficult to get along with. It was one of those times when for reasons of budget cuts they had to let people go.