This isn't true. Look at his speeches more carefully. He does what I saw in the youtube video of the real kinds speech. He slurs at a point he was about to stutter on. It's really obvious, just listen carefully. Sometimes he might start stuttering and need to take a moment but that's the nature of the beast. Most times I see he sidesteps it now by slurring that sound the exact same way as the real kings speech videos out there, not the ones from the movie. Feel free to compare the to and you'll catch it.