Your always late to the party so I have to repeat points I've already made.
You can't take the gracias as a measure of bjj, any more than you can Bruce Lee for king fu, you need some sort of median to judge it off, but doesn't not get used( mu ch) in mma, with out it being augmented with some kicking punching and defence skills, so it's not bjj, and anyway those who have progressed it as far as mmA aRe not typical bjjer,
If they are operating in weight classes and no one is attacking them with a chair or even a punch, then it's carry over to sd, is unproven