This is actually really accurate in a strange way.
If you watch the documentaries on "behind the scenes" of princess mononoke and spirited away, he is really tough on his employees. His producer toshio suzuki once said that if your a good artist, he'll put you to the test and go extra hard on you. So act like a bad artist or mediocre and he'll leave you alone.
Miyazaki is super old-school and a tough perfectionist if you work under him.
But this was really great.