I believe so, as far as I could tell. They don't have any sort of language that I know of, but they were more organized than you'd expect. It wasn't like fighting a pack of animals. They could create choke points or destroy means of retreat, real strategy. From what I've read and what I've heard, that means they were getting some form of direction from the archdemon. Whether it was outright control, I couldn't tell you. They scattered the moment it was defeated, though.