Originally Posted by
planemechanic
Not on any flight I have been on in the past few years. Many if not most of my flights are 100% full.
Though bear in mind that the average passenger will experience more crowded flights than the average load factor, because there are more people on busy flights to experience the crowding. No-one ever experiences a completely empty flight, because they're not on it.
This is closely related to the friendship paradox:
http://en.wikipedia.org/wiki/Friendship_paradox