That's a great example shot at that link. Cool, never even thought this is an issue. I wonder what my camcorder is doing...
As I said in the other post, I think that the purpose of the footage is important to the discussion.
24fps for that "cinema look" (which frankly, I don't really understand, I'll have to pay more attention).
30fps Progressive for internet video, as this is what most upload sites accept, and most monitors, will work best at.
60fps Interlaced for viewing on TV and/or intended for broadcast. This will look smoother than 30p while using the same amount of space, and taking up half the memory of 60p. 60i doesn't display well on a computer monitor.
I wonder what is the technical reason why a DSLR capable of shooting 30p doesn't offer the option of 60i. And a camcorder capable of 60i doesn't offer the option of 30p. I'd think the data throughput is similar so... why not? I can only imagine the reason is in the CMOS chip. A CMOS is very much like a little computer right on the chip, doing a lot of processing right onboard. That contrasts to a CCD chip which is a much simpler device where ALL processing is done in another processor. I'd guess the CMOS sensors are specialized for the task they are intended. The DSLR CMOS chip is set up for progressive, since that's how photos are done. A camcorder CMOS is set up for interlaced, since they are intended for TV display (or were, I think that's changing). You'll notice the less expensive camcorders (Sony Bloggie, Flip, etc.) all shoot progressive. They know that customer is intending to display on a computer.