My gym is a Royce Gracie affiliate. Evidently, (and this is coming from my instructor) Royce asked him to open a gym back in the day, when he was a purple belt. Over the years he got promoted, etc, etc. I'm not sure how long ago the gym was opened, but he started training in 97, and he is now a brown belt. Not sure how long he was a purple, etc.
Anyway, Royce does seminars every so often, as does Rodrigo, Kyra, Royler, etc.
I'm in the beginner/white belt class. I wouldn't consider myself a "Royce Gracie" white belt, or whatever. My head instructor is a brown belt under Royce, I'm a white belt under him. It takes generally 8 or 9 months (for the average person) to make it to 4 stripe white belt, which is when you move up to the advanced class. after that it depends on the person on how soon they get their blue.
About half the time, a 4 stripe blue belt teaches the beginner class, with two other blue belts assisting him. (there are usually 15 to 25 in any given class) the other half, the head instructor teaches our class. (the brown belt) and on saturdays, a purple belt teaches our class. While i can tell that the brown and purple have more knowledge, all of them are great teachers, and i learn a lot from each of them. I never feel shorted on my instruction.
anyway, that is just how it is at my gym, I can say that its the same at every Royce Gracie Affiliate, or whatever. Hope this helped.