Just adding onto this it seems to be the case that most of the delay caused when deplaning is actually as a result of stairs needing to be pulled alongside but more commonly it is the Fast Bag. This is particularly frustrating for flights where there is maybe only one or two fast bags (which seem to be most flights I go on) as it can take quite some time for them to get the fast bag trolley, open the baggage hold and finally put them on the trolley. The benefit is even more useless at Hokitika and perhaps Nelson where you save perhaps a minute tops by using Fast Bags at the expense of everyone else waiting for your special fast bag.