Charlemagne
Black Belt
That's what I'm there for.They are good at what they do when it comes to the jiu jitsu, which is what is all about.
I don't know if they have proven the 90% thing, but I think it is pretty fair to say that they have proven that if someone wants to take you to the ground, even if you are a trained martial artist, it is pretty hard to stop them.
As for the propaganda machine, some of that criticism is fair. I would say however, that they, far more than most, have put themselves out there in a real way to prove that what they do works, and as such, have earned at least some right to talk up what they do. If all martial artists held themselves to a similar standard of real world performance we would have a lot fewer people getting ripped off.