I agree the AAIB will be acting under the very best intentions. After all, some of them, and their families may well be on RR equipped 777s on their holidays this summer too.
Where an obvious, or perhaps obvious after you look hard enough factor somes into play, they will put that new information to best use as soon as possible, without question.
The causes here are not like that, and they are working methodically as fast as possible and the end result will vindicate this. I've had first hand experience of the AAIB and their methods and have nothing but respect and faith in their investigators and techniques.