One thing from the article that isn't clear. Do people who see little people actually believe they are real, even when they know about the potential effect of these mushrooms?

This is a fundamental difference between psychedelics such as psilocybin and deliriants like datura. Usually, with psychedelics, you know that what you are seeing is not real, or at least, that it is not normal. With deliriants, even if you know exactly what you took and the effect it has, the crazy things you are seeing feel real and perfectly normal until the effect wears off.

What make me feel goes to the psychedelic side is that description talk about something wonderful, or at least worthy of attention. If it was a hallucination in its purest sense, the presence of little people would be no weirder than that of a cat or a dog.

But the fact that it is generally considered unpleasant and not used for recreational or spiritual purposes is more of a deliriant thing.