This is a good question. I think that lean gains (i.e. 16/8) should not be considered intermittent fasting, as it is by many. It is not intermittent if it is implemented in the same manner on a daily basis. Intermittent means "occurring at irregular intervals," so if you're eating in a certain window everyday, that would be a regular eating interval. People are very lax and imprecise with language, either out of laziness or ignorance, and I don't know which one is worse.
I recently got ragged on because I said I ate a small breakfast (between 50 and 250 calories) after I get back from my morning run. I also workout 2-3x a day, am active, and do things that require significant amounts of mental energy and concentration. Some people seem to think that if it's anything like conventional wisdom, it must be inherently wrong, so the extreme opposite must be better. But honestly, there are only a handful of people who I pay attention to on this website, and every one of them (save 1) has a gravitar. I'd also be very surprised if there were many "ripped" people eating just one meal a day. I can think of a couple who eat 2 meals a day and could be considered ripped (speaking of males here), but that's two , and I haven't even met them in real life.
I've been involved in some from of sport practically my entire life. I can tell you that I would not be able to compete in swimming, soccer, or lightweight crew if I were eating one meal a day.