Time flies when...

I posted a couple of months ago about the psychology of queuing and how people are more content in a moving queue - however slowly it's going - than in a stationary queue.  Well I was reading the other day about the original experiment which gave rise to this theory.  It involved Houston airport in the US where they were getting serious complaints about the length of time passengers had to wait to get their bags off the carousel after they landed.  So the airport decided to do something about it (are you listening Birmingham - they decided to DO SOMETHING ABOUT IT!) and put more baggage handlers on the job, and got the waiting time down to just eight minutes (are you listening Birmingham??) but there were still complaints.  So then someone had a bright idea - they moved the arrival gates much further away from the carousels, so that passengers had to walk much further to get there, which took them longer, so that by the time they had got there, the bags were already coming through.  Result - complaints virtually disappeared.  So the time between getting off the aircraft and picking up their bags stayed the same, but that time was now taken up with walking rather than, as before, hanging around waiting. Which gave rise to the concept of "occupied" and "unoccupied" time - the former being acceptable, the latter not so.  Interesting, yes?