I can't argue but the latest airline schedule shows 772's exclusively on the SIN-AKL sector from 4th July. Further, i was unable to book a 774 for SIN-AKL at Christmas. Was told by summer only 772's on this route. Very odd - this is the peak travel time.
I flew AKL-SIN on Sunday. Only two pax in F. J was 1 seat short of full. On SIN-AKL three days earlier J was full.