I was mainly speaking of the Trents. The RB211 was never intended for the 767, it was requested by BA, but its true, it was not great for the 747 and was mainly ordered by the commonwealth.
Of course airlines are now going away from the Trent for the 777, GE bought their way into the LR program. Look at the stink AA, for example, kicked up when that occured. Incidently BA have always had more GE powered 777s than RR.
QF were in part screwed by the amount of sensationalist media coverage they received. How much of world heard about N330AA? Sure they will be angered by the incident and grounding, on the other hand, you shouldn't base a decision on 1 event - the aircraft will be in service for up to 20 years.
I not interested in a pissing contest though, plenty of prestigious airlines have endorsed the Trent, and in numbers. So back to my original point, the design must be doing something right, if that thing isn't fuel consumption.