Brad Bird quote

"There are great animators just as there are great actors I gave a talk once using [digital] animation from the [1996] movie Dragon Heart. I showed two sequences and asked the audience which they believed; they said one sequence but not the other, as they said it looked fake. I said, "Yes, but why?" They couldn't tell me. The interesting thing was, it was the same technology and the same [animation] model; the only thing different was the animator. You can be convincing without being real."

Brad Bird is everywhere right now, promoting Tomorrowland.  This interview has a fair amount to say about animation.