The main delay in boarding is caused by the bloody people who clamber up the steps, find their seats, double check all adjacent seat numbers to make sure they have indeed found the right one, look to see who else is sitting near them, start negotiating for a window seat and then stand in the aisle taking off coats, cardigans etc, raking through their handbags for sweets, stowing stuff in the overhead lockers and still won't fecking sit down!
You don't need research to tell you that ~ just stand in the cabin doorway and watch any flight boarding.
