David Mitchell is a stammerer who wrote beautifully about it in his semi-autobiographical novel Black Swan Green. Here is Mitchell on The King’s Speech.  In the article he talks about his own strategies for coping with stammering:

If these technical fixes tackle the problem once it’s begun, “attitudinal stances” seek to dampen the emotions that trigger my stammer in the first place. Most helpful has been a sort of militant indifference to how my audience might perceive me. Nothing fans a stammer’s flames like the fear that your listener is thinking “Jeez, what is wrong with this spasm-faced, eyeball-popping strangulated guy?” But if I persuade myself that this taxing sentence will take as long as it bloody well takes and if you, dear listener, are embarrassed then that’s your problem, I tend not to stammer. This explains how we can speak without trouble to animals and to ourselves: our fluency isn’t being assessed. This is also why it’s helpful for non-stammerers to maintain steady eye contact, and to send vibes that convey, “No hurry, we’ve got all the time in the world.”

(Gat Gape:  The Browser) Incidentally, I watched The King’s Speech and also True Grit on a flight to San Francisco Sunday night while the Oscars were being handed out down below. I enjoyed the portrayal of stammering in TKS but unlike Mitchell I didn’t think that subject matter alone carried an entire film.  And there wasn’t much else to it.  (And by the way here is Christopher Hitchens complaining about the softie treatment of Churchill and King Edward VIII.)

True Grit was also a big disappointment.  I haven’t seen Black Swan but I hear it has some great kung fu scenes.