Interesting technique, but IF the rumors are true that multiple frame rates are available I'd prefer to review them in a 24p timeline to decide whether to change the pace of the action, camera move, or frame rate, & watch for strobing.
I shoot a lot of B-Roll off-speed, & the AF100's ability to review any of it's variable frame rates in a 24p timeline is very useful.
I bet the GH2 will write some or all of its slow motion files to a 1080p @ 30 FPS timeline.