I haven't seen them ever focus on it so it's probably a non issue.
There's a thread about this before and no one contests that Sony studios have more impact in pushing 3D envelope with "better graphics".
You will see this in developer notes and commentaries I think one was called sigraph and some other events.
Xbox isn't even in the same calibre. I assume MS have among the best tier though just not their first party Xbox devs.
I believe Ubisoft is a good match with Sony's. ID seems pretty good too. Didn't Sony get ideas from the groundbreaking motion matching of a ubisoft dev for animation?
I also think there are so many unsung heroes because some haven't had good implementation yet but their program/algorythm seem sound.