If you’ve ever been in line at the DMV, had your flight delayed, desperately needed an email reply to come NOW, or had a YouTube video buffer for more than a couple seconds, you know that waiting is awful. But what can we learn from it? According to Jason Farman, author of “Delayed Response: The Art of Waiting from the Ancient to the Instant World,” the answer is quite a lot. And it touches on everything from aboriginal message sticks, to pneumatic tubes, to loading icons.