SNAFU
With all due respect to the tech guys in QF, I wouldn't have thought there was any special black magic about 1) operating Boeings 2) RNP and 3) HGS. Also,it is hard to believe that a professional airline exec like the CP would withold knowledge from whoever in the QF Group needed it, however low-level that knowledge was.
In any case I understood from the newspaper ads last year that Jetstar was going to hire a number of 777 drivers who would be easily able to obtain the common type rating (787/777). So the initial cadre of JQ check and training pilots would be heavily weighted toward guys with lots of 777 time. As nobody in Qantas has a 777 rating and AIPA won't allow DECs maybe it makes a lot of sense to build the 787 capability within Jetstar so after they have it mastered they can then teach the Qantas pilots how it all works.
Anyway, thats an outsiders view. I guess they all know what they're doing.