1200 hours or 12000 hours, it means very little, all pretty meaningless. It's what you do with those hours that count. I have a mate with barely 1500 tt but a large chunk of those on fast jets, worth far more than 12000 spent looking out the window while the autopilot flies.
The point I'm making is that if IO540 has 1200 hours then he's doing far better than the majority of private flyers and going places where most will never even attempt.