Where do you guys get off posting nonsense on PPrune; what could even be interpreted as slander?
"possibly", "probably", "might have been"? You guys have no idea.
QF 767's routinely use the shorter of the two runways in NRT.... for flights to and from Cairns. There is a quota system for the two rwys up there and QF has an allocation for movements on each rwy. The shorter rwy is tight but fine for a departure to Cairns. I did it many times when on the 76. Yes, you rotated near the end of the rwy, as the "reds" are approaching, but "below VR"? Nonsense.
The longer sectors (to from SYD, MEL, PER) always use the longer rwy.
On the short rwy the power used for takeoff was full charge. No derate. If the wind and temperature precluded a takeoff on the short rwy then you operationally required, and would receive, the longer rwy.
In any emergency, or if a u/s meant you needed the longer rwy for departure, then that's what you would get.
There is no way crews would "do the figures for the long and then use the short". If you've ever used the convoluted taxiways to reach the short rwy in NRT you'd understand there's no way you'd be confused.
Give it a break fellas before this crap ends up in the papers also.