Agreed. That is Sorkin's writing at its best. It was a marvelous scene.
Unfortunately, I didn't find that the rest of the episode lived up to the promise, or interest, of that scene--I was nodding off toward the end. There is so much good potential here (including a great cast) I hope it improves, and one critic I read said that "Newsroom" hits its stride in the third or fourth episode, so I'll try and hang on.