I shoot allot of aircraft, and cdaf is still not fast enough. I can get some shots with my epl-1, but no where near as good as my dslr. Especially with multi frame burst. But the other problem is the EVF refresh rate.
Now the GH2 does boast a dslr speed cdaf system. But the evf will hold it a bit back for action.
But shooting large aircraft is a bit easier. If you shoot the small prop plane with more zoom, it would have had allot of problems.