I followed one of the 787 CHC-AKL flights on flightradar24, & from takeoff to touchdown, & it would have been about 1 hour five minutes except ATC had them go almost to the Hauraki Gulf coastline, so finished up a few minutes longer.
I guess the small difference in cruise speed is more than eaten up by the bus transfer at AKL.
So what happens at CHC when they use gate '22A'? Do you go out along the airbridge then down some stairs then up more stairs to the 787? Gates 21 and 22 are usually the Jetstar gates I think.