CX714 can be have extremely variable loads. Once, I was op-uped including 4 others, and it was the highest density 773 in the regional config (most Y seat in the CX fleet). A couple of months after that, the same flight operated by a 744, departed 20 mins early as there was virtually nobody to board or luggage to load. With a little bit of tail wind, it arrived HKG almost an hour ahead of schedule - to an empty airport at 4-ish am.