I never met Royce, [although I believe he's going to be on island next week] but from what I've seen of him over the years he seriously lacks social skills, language and communication skills, too.
As for other members of the Gracie family my experiences have been the opposite of what's been mentioned. They are humble, quiet, friendly and would never, and I mean never, speak badly about another Martial Art. I've been with some of them at seminars, trained at their schools, even been in their home, it's just not something they do.
As for BJJ students spouting off about other arts, I really haven't seen or heard that either. I'm not doubting what you guys have said, not at all, I just haven't seen or heard it. Now, if you're talking about white belts, which there always seems to be more of than any other rank, that's a different story. A six month white belt can be like an egotistical cannibal....just completely full of himself. But white belts in any art are somewhere between a carrot and a parrot on the intelligence scale, and somewhere between a rookie security guard and a politician on the full of you-know-what scale. [no offense intended to carrots and parrots]
As for any art being perfect, ain't no such thing.....other than, you know, Sinanju and Ameri-Do-Te.