Interesting! I submit it is actually an inefficient way to communicate. Communication is as much non-verbal as it is verbal. I know some people have difficulty interpreting non-verbal cues and messages, but it’s definitely lost in text. One has to recreate it textually, which can be really hard to do by ordinary people who aren’t poets. And how much of the nonverbal stuff is subconscious, maybe even pheromonal, so that we wouldn’t know how to express it in text? I think that’s why emoticons and emoji were invented, to somehow represent those lost avenues.
I have an aversion to telephones for this reason. You get the words, and you get the emotions embedded in the words (stressed words, differences in pitch), but you don’t get the visual cues. For me it’s worse than text, because I feel like I’m getting a garbled message, only part of which I understand. At least in text I can just take it at face value. All my writing tends to be pretty unemotional for that reason. But I’m sure my choice of words and phrasing adds to the message – just not as much as talking to someone face-to-face.