i think it is good wisdom for many things in life. I remember when I worked at MCI/Worldcom I had to resolve trouble tickets. We used a program that tracked how long the tickets stayed in our queue and was used to measure our performance. A lot of times you can't work on a problem because you are waiting for some kind of input from the customer. This system dealt with this by not accumulating time if the ticket was in "customer time".
Clearly this became a game to get the ticket into customer time as fast as possible and leave it in as long as possible ;)