I'd say that the two worlds I've described don't correspond exactly to professional vs amateur writers - as you say, there are some who do both, and there are some amateurs who despise fanfic in the same way and for the same reasons as the anti-fanfic pro writers. It's an attitude thing rather than a status thing... I don't think it's only the people who straddle (or have crossed) the divide who understand the Fanworld state of mind.

It's tempting to describe it as a masculine/feminine divide, and there's much to be said for that, even though there are females in ProVerse and males in Fanworld.

Another thing the ProVerse people tend to forget is that what emerges as published fiction is, of course, selected. And polished and finished. Fanfic on the internet runs the entire gamut from prizewinners to the dregs of the slush pile, because there isn't any limitation at the publishing end. If we looked at *all* the fiction that is submitted to publishers, rather than just the stuff that has made it through the process and been published, there wouldn't be quite such a quality issue, would there?