Hey out of curiousity, is AE able to detect the 2:3 pulldown if you shoot at 1080 24p? Unlike 720pN, there is no 24pN in 1080, it's imbedid in the 60i stream. Even at that it's only 1280x1080 as well!
It is HD, its 720p. It's also not actually 4:3 that's just the frame aspect ratio without corrections for the pixel aspect ratio. Complicated stuff really, but like I said this is the settings that you would use for an HVX or HPX if you are shooting 720 24pn.