I do believe its true, some people simply arent affected I believe salvia to be a hypnotic, not everyone can be hypnotized but about 10% of the population is capable of "sonambulism" which means they can be hypnotized and not even remember what they did on it. So I dont doubt a few people may be having some sort of experience, salvia is widely overblown, overhyped and exploited, A few years back the same claim was made of syrian rue which most people simply puked there gut up on (you had to ingest it) - I dont concider salvia recreational at all or even fun and thats the way people have chosen to market it, if it had anywhere near the experience as people claim it would have been made illegal long ago, I concider it more legal high bull.