[blueskin_]

>This is just flat out wrong. "Depthifying" things in post produces better 3D, full stop, because a single 3D depth works poorly across the entire image.

No, you're flat out wrong. Again, would you colour in a black and white film in postproduction and expect an accurate result?

As movies normally create depth by blurring objects at different distances to mimic the human eye, this interferes with actual focusable depth if it is postprocessed into 3D. It is possisble to do it right, but it takes the best part of a year (see: the 3D-ifying of Titanic), not two weeks like Disney moview or Clash Of The Titans took.

Point taken about animated films usually having better 3D, but that is exactly because it's easier and cheaper to produce natively.