Do these things usually show up on romance forums? I've never heard any of them. I do sometimes cite Nora Roberts as someone who writes fast, writes well, and who makes a lot of money, but also as someone who's one of my favorite writers.
I've seen quite a lot of speculation about Nora on forums that aren't romance-specific, James, but they definitely pop up on the various romance sites. Usually begins with the question of how fast or slow some writers produce, and because Nora's numbers are so astonishing, her name gets trotted out. Which is fine -- until people start making up their minds that she simply cannot be producing so many books, being so successful, all by her little ole self.
You can see how she might get irritated about that.
But I know she's always appreciative of respect from a peer, so thanks on her behalf for that.