All GTA pilots are officers, so we're talking a ninety-day wonder officer training program in addition to flight training. I'm making the assumption that standard flight training is about two years from the time the recruit enters the system to the time he's piloting a fightercraft. (Admittedly, you could dispense with a lot of it being physical in practice, but then, we will.) Cutting it in half, first to a year, then again in half to six months, is about what historically people do. Those nations which have in wartime gone below the quarter-peacetime training regimen usually see a drop in pilot quality so sharp as to nullify the benefits.
Of course I'm assuming an integrated training scheme here rather than a seperate preflight and flight one.
Well in regards to Officer Training, currently at the Australian Defence Force Academy, studies are supplemented by an individual "Leadership Subject", so some very, very, basic Leadership skills could be taught in that 90 day window. I mean, what use are golden pilots if all your ships are gone by the time they're ready?
Included Advanced and Basic Flight Training, our pilot's course is hovering around 77 weeks over here, without counting officer training, so I'd say you're right in regards to Flight Training taking around 2 years. Well, the space environment is dramatically different to flying in an atmosphere, for one, there's no ground which may be harmful to the well being of the aircraft

, which is the biggest difference between comparing current stats to "Future Stats". So what you come down to, is pilot's who either have a natural touch for the joystick (Light handed, soft on the controls) and those who don't, and we could assume Pilot Specialist Testing would've gotten advanced enough by that stage to weed out Heavy-Handed guys and girls who seem to think that the weight of the aircraft co-relates to the effort it takes to move the control surfaces. I mean, we have that already these days, for those of you who've had experience with Modern Selection Programs for Pilots in the Military.
And we saw that in the Battle of Britain, pilots who'd had close to 9 hours flight experience were being posted to Squadrons, and they either had it or they didn't. In retrospect, I'd say 6 months was reasonable as a severely shortened pilot training program, but if the need arose, I could always see pilot training being cut down to 3 months.