This is when two parties (most often a couple) find themselves in a heightened state of readiness whereby both eagerly await a text message from one another while each is simultaneously unwilling to send one. Often, the first to cave is perceived as being a weak, ineffectual, or submissive.
wow, have they been like this all day?
Yes, each of them is poised to hit send...but...well, you know...
Sí, Sí. They've got themselves a Textican Standoff.