Reading through the comments about the "recruit by grep" methods made me wonder: what are the chances this was a Facebook chatbot instead of a human recruiter?

Reading through the comments about the "recruit by grep" methods made me wonder: what are the chances this was a Facebook chatbot instead of a human recruiter? Anybody in the know able to say whether it would have that level of conversational fluidity (e.g. "Thanks for the tutorial but..." sounds a bit too human to me)?