Well, I'm still a Green belt 1 and in the middle of a very slow fight against another Green Belt. So at the least I still have 3 fights to win before I make it to Brown (and that assumes that my unbelievable winning streak could continue!). So you will probably reach Green before I reach Brown.
The good news is that as I understand it, you don't have to leave the dojo necesaraly. You would get to choose your Green Belt Dojo style (unless there is another Brown when you get to Green) and be able to take on students of your own, but that does not mean that you have to leave the dojo like it did in the old rules. I believe that you can start your own dojo and still be a student of mine at the same time, but I'm not completely sure how it works. I'll post a thread asking Wicht for a ruling on it.