A friend of mine is a RR engineer and has worked on the Dreamliner engines. His advice to me was, whatever you do, don't fly on one until I tell you it's OK. Big probs trying to get the power and efficiency required I'm told.
With the amount of time before an airline actually gets to operate a 787 hopefully Rolls will have solved this problem,but Mon will have probably seen the light before this and bought a load of 330s!!