Sorry, but the Mehrabian myth has been debunked by Mehrabian himself. The 55-38-7 "rule" was with respect to a very specific subset of communication - the communication of emotional content - not all communication.
As this article points out:
"Think of it this way: if tone and facial expression conveyed 93% of meaning in a conversation, we would have no need to learn foreign languages. Calls would be obsolete, emails would be pointless, digital service desks would be in disarray, and you’d even struggle to understand this blog post."
I appreciate that the thrust of this piece was with regard to emotional communication but even that involves the transmission of information, some of which can stand to be sent via text or email. That said, I certainly agree that the sending of a text about an emotional subject whilst one is emotional (or whist one can reasonably expect the other person to be emotional about the subject) defintely is a must to avoid.
