kfahmi, i have personally witnessed passengers complain that the aircraft was so small numerous time. One was a B727, the other S80, but they go on it and the airline got its money. Frequency is what hub and spokes are all about and to fill the the feeder and mainline aircraft with ****ed, rude, obnoxious passengers who the airline has there money up front.

it is not as it has been mentioned cost only, frequecy is a big factor.