I'd argue real newsrooms can get pretty hectic, it's just that in those times it's probably more along the lines of the beginning of George A. Romero's Dawn of the Dead (not because of zombies, just the general tense atmosphere in the control room), and people are way too mad to let a full-on Sorkin-written monologue go on unchecked by anyone in the room. At least, my experiences as a Radio/Television undergrad would have suggested that; not an all the time thing, but hot heads are hot heads.
Still, as unrealistic as it is compared to the way people actually talk, I loved watching the first episode on Youtube a while back; wish I had HBO, as I'm too paranoid to download anything. I've heard Game of Thrones is awesome as well, for different reasons, obviously.
