Don't Air New Zealand have a few of their A320's with performance upgrade kits to enable trans tasman operations out of NZRO - YSSY. NZRO is over 1000' high, 30m wide, and around 1760m long. Maybe they are going to deploy these aircraft on this route as well. I seem to remember reading something about the engines being 'up-rated' to enable this route to launch??
Someone out there will know.