I was lurking on TMs (as always...) and came across some "insider info" from cometomama, who's been on the set.
"One of the sound guys invited me over to their station listen/watch three VERY awesome and intense scenes being filmed yesterday! His accent is FLAWLESS! And when he's out of character and off set, his British accent is delish, though he has quite the potty mouth.
Even naughty words sounded good coming out of his mouth! hahaha!!
I didn't see a growling scene. One of the scenes, the most intense one, was of him by his car with Emmett, and Bella walks down the stairs and past him. They zoomed the camera in to his fists balling up on the door of his car and then he rolls back and puts his head back on the roof of the car and the camera zooms in and you see this excruciating look on his face and his pitch black eyes. It is INSANE - I get chills just thinking about it!!!!!
One of the other scenes was with Edward and Jasper, again standing by Edward's car, across the car from each other, and Jasper is telling him that it's not worth it and Edward is trying to talk himself out of killing Bella.
If the few scenes I heard/saw yesterday are indicative, this is going to be the BEST movie. The camera work alone, even without sound, is just awesome."
Once again WE LOVE YOU TWILIGHT MOMS!! Thanks for all the scoop. I'm living off it.