...Ed Norton isn't a real actor. Here's a test: a real actor -- regardless of the approach -- settles their whole selves into the character. That's the only way to make things work. A poor actor is always there, always present, controlling his instrument. That uses one side of the brain as a puppetmaster for the rest of the body. That works for all parts of the body but the face: the two halves are unavoidably controlled by the two sides of the brain.
So, for example watch Harrison Ford. When he speaks, only one side of his mouth moves. When he uses his eyes (rare) only one is affected. You can literally see one side of his face as the actor manipulating the other side as character. Now watch Ed Norton here. Same thing. Impossible to hide if you are a bad actor, an incomplete artist...
Yeah, uh, WTF?