It is debunked. Wikipedia states that Mehrabian's experiment included only women, and that subsequent experiment found contradictory results on the relative imp

It is debunked. Wikipedia states that Mehrabian's experiment included only women, and that subsequent experiment found contradictory results on the relative importance of verbal and non verbal cues. What remains is a collection of factors letting one build a theory of mind of the other person, decide the other's attractiveness or lack thereof, etc..