Usually we split out forums like that when the traffic warrants it. I know that we have had this discussion on those exact frameworks and determined that the traffic isn't there yet, I think. Here is a thread on that topic.
In that thread it looks like we were going to do it, however, it was all turned back. If we were to change forums we would do it slowly, and see what the traffic is like, but to be honest, I don't see that too soon, in my opinion.