Sorry to even say this, as im assuming it is a lot of work to move all those posts.
Scott,
You are correct. But it depends on what the objective is. If it is to have a board devoted solely to the Detroit style, as the topic heading of Roger's post suggested, that would mean that someone (right now that means Steve, Bill or me) would have to go through all of the threads in the Sicilian board and study each thread and decide whether it stays or it moves to the new Detroit board. Right now, there are a total of 456 threads in the Sicilian board. That would be a monumental task that would take a lot of time and work to do. And, right now, we do not have the resources for such an effort.
A simpler solution would be to leave everything alone and change the heading of the Sicilian board to something simple (and only a few words, like all of the other style boards) like Sicilian/Detroit Style. And Steve would have to approve such a change.
As an aside, this morning I looked at the threads in the Thick Style board and saw two threads that were improperly posted there. I moved them to the Sicilian board.
Peter