You don’t mean TPM? The HDTV version of that is extremely grainy, and the blu-ray is heavily DNRed. AoTC was shot digitally, so I’m not sure there was a need for DNR. The picture quality is better on blu-ray, though.
I’ve heard others say AoTC was DNRed too. Being shot on early digital cameras, it’s not too surprising that there would be a lot of digital noise. This noise would look similar to grain, but it would be less prevalent. It’s simply an artifact of the ancient sensors the film was shot on.