Oh there is, but there simply aren't many BJJ black belts out there, I can think of one that I know of out of the active Dog Brothers in the US though there may be more that I am not aware of. I know of at least two browns and the numbers go up from there for the lower ranks. It is an important range but only one part of the arms race. One other factor that apparently isn't as big in Europe or Canada is the use of hideaway knives in the US Gatherings. I can make up for my BJJ white belt with a knife.