The crew cut seems to make McGee's features sharper also. The change was too drastic. Before the weight loss he also appeared taller, now he's just an oomph shorter than DiNozo.
Michael Weatherly is really an incredible actor.....the several times he's been in an out-of-the-ordinary situation (saving Ziva for one), he totally becomes that person. He had another of those stints the beginning of this season.