She looks right, here's hoping she flies right and turns out to be the darling of frugality we haven been told she is. This has far wider implications than only BBD, as the GTF engine will power a long list of upcoming new aircraft - not least of which is the A320neo series.
I think this is worse for Airbus than for Boeing. The A320 is their meat and potatoes and offsets the likely never-to-be-recouped cost of the A380. The 777 has it all over the A340 and A330 and the 787, once debugged, is sure to have a huge advantage over the A350. Boeing can afford competition in the 737 sector but Airbus cannot in the A320 sector. It's good to have a third player again!
Coming from Murrica by any chance?
The A320neo is to A what the 737 is to B. The neo has outsold the MAX 3 to 1 and has converted multiple carriers from A to B. The MAX has converted one airline.
The 777 has sold 1470 copies and has a backlog of around 339, split over the 77W, 77L and 77F - the vast majority being 77W. The 330 has sold 1256 copies with a backlog of 248, 2/3rds of which is for the -300. The 340 has sold 377 copies, with zero in backlog. 1256 + 377 is still, however, more than 1470.
The 787 is a class smaller than the 350, which explains why the 350 has more or less put the current 777 line to bed (77W sells like hotcakes cause the 350-1000 won't be out till 2017) and forced B to develop the 777X.
Apart from that, your arguments are quite sound.