I haven’t had any jello-cam issues on a variety of footage, although I know they’re possible to come by. As far as skewing, isn’t that mostly noticeable by putting a vertical line in your shot and panning back and forth? Otherwise I doubt it’s a problem for the viewer.
If one’s going to get hyper-critical about movement, you can always get into the idea that MPEG footage may go soft during motion, too. That may not seem like a big deal until you try to stabilize it.
I have the Sony air stunt footage (they sent out demo DVDs to interested customers) and it looks amazing. I looked for those artifacts, albeit not frame-by-frame, and was sold on the EX cameras after viewing. I was already spooked by all the people crying from the mountaintops about long-GOP issues, jello-cam issues, skewing issues, and whatever else you can throw at them. The footage on the DVD and from our initial tests with the camera put my fears to rest. Bottom line is, I’m happy with the footage and the price point.
One other thing I could point out is that these cameras are reasonably forgiving. I’m primarily an editor and resident workflow guy, but when I do get to go out on a second unit shoot or something I’m easily able to get what I want from these cameras even if I’m a bit rusty. I’m no ace cinematographer, but I’m able to get clear, properly exposed footage with great detail and it makes my superiors and clients happy.
Cf