Yes, but a diet is not a magic incantation that you can get the effects of by merely repeating the word or discussing it endlessly with friends.

Diets work (or not) based on fairly straightforward causal chains. People who want to continue to do exactly or very nearly the same of whatever they were doing and see a drastic change are bound to be disappointed not only in the mission of reducing weight but also in life.

Oh, do all diets have identically enthusiastic and identically educated communities around them, and the approaches and rules and effects of satiety are identical for all diets?

It's interesting how there used to be so much variance in the world (and in fact, you can turn on the TV or get on a plane and still see variance everywhere you go).....yet if you were to take the word of people on the internet, everything is identical everywhere.