Yes, but I don't think FB is related.
People are asking broad, open ended questions, often with 6 or 7 broad open ended questions. And then long back and forth discussions get going in the comments.
Another sign of problems is the question never really has one answer that is accepted and the top voted answer doesn't seem to be a "clincher" like I see in the programming sites.
If we had more questions, we could raise the quality by killing off the worst questions, but with only a handuful of questions a-day, we are killing of only the worst of the worst questions and making do with what we have left.
If we get more volume, the built in systems in SE will kick in and the front page will start to show the high quality questions and the low quality ones will sink out of sight.