Perhaps it took five seconds to implement, but it's not like it was the first time these hackers saw a MBA and Safari.
I'm sure there were dozens or hundreds of hours worth of research and coding in order for these guys to get to the point of being able to implement their hack.
I remain unconcerned.
2-3 weeks of set up it said. Still, 2-3 weeks is an eternity of time for how slow some things get patched. It was also just starting a calculator...an already existing program, but it'd be a big loophole for trojans, or even other non-secured programs that contain important data.
Theoretically it could be used to open important documents already on the machine.