A good illustration of this is riding the NYC subway. I think most people would choose a slower-moving local line if it shows up before the more efficient express line, even if the express would get you to your destination sooner.
I used to do that with bus lines, provided I could get a seat. Between 20 mins standing + 20 mins crowded fast bus line (standing) and 60 minutes comfortably seated with no wait, I always choose the later.
But, I may be the exception, as I find riding the bus a pleasurable activity.