At the point where a text message is sent to someone there is an expectation to receive one back, this wait...usually long and painful is known as the "texpectation"
I really hate having texpectations sent on people, because if they don't answer me...I feel clearly ignored.
When you expect all your friends, family, co-workers, and anyone you know and ever will know, to be just as fast with text responses that you are.
Hey Bob, you never text me back! I guess I need to lower my texpectations.