The A350 with Qatar is a duck and you won't see one of their's out in Aust until they launch the WXB1000. Their current models (900's) are burning 2+tonnes more per hour than their B773's while carrying much less. The WXB1000 hopes to be comparable. Let's see what improvements in the engines they make.
Complete bollocks. As someone currently flying the 350, and employed by a major operator of the 777ER; the 350 cruises at M0.85 (LRC ~ CI60), & blocks ~ 6T/hr. By comparison, the 777ER gets along at M0.83 & blocks ~ 8.0T/hr. The 777ER will carry a higher payload on a 12hr sector, but beyond about 14 hours, the 350-900 carries a higher payload than the 777 due much lower fuel burn & 30T lighter basic weight. No idea (yet) about the 350-1000.
VS