I've had two door-to-door visits in 4 plus years. They don't hang around long, even when (TV going, door open) it's obvious someone is home.
I once knew a pioneer sister who told me (and not in jest) that she started her time the minute she started putting her pantyhose on. Another I know gets up and immediately sends a text message to an "interested person" and then starts her time. Total time counted, several hours. Conversations, zero.