Re: Compressor: Why is there a Progressive setting if DVD is interlaced?

So to ask the question that always gets asked yet again, but in more detail...

Source footage is 1080 24p (23.976, obviously, just shorthanding).

Final cut is same.

For the DVD...

Is there any advantage to converting to 29.97 interlaced? That's what the post house did in the encode, but I thought we should keep it 24p. Might that play better on some DVD players, even nowadays?

Here's a more specific question:

For anyone who has an HDTV (most folks now) and a current DVD player (say, PS3), would a DVD authored at 24p play directly as 24p without any conversion/interlacing?

And thus, would it look better than if the footage had been encoded as 29.97i?

It's a fairly major post house, and the folks I spoke to there said I was wrong that most Hollywood DVDs are 24p. Am I? If they're not 24p, why does advancing one frame always show a new frame, whereas advancing one frame on the interlaced DVD they gave me only shows a new frame every 2nd and 5th time?

Thanks for any expertise here!