Enson and Egan are both pro fighters. If their gyms are for training pro-fighters, you've got to expect a different level of intensity to most 'hobby' (no disrespect intended) dojos.
I would imagine that pro-boxing gyms can be fairly intense, scary places, too.
Anyway, as Kit said we've come full circle. But has anybody answered John's original question? (will the word 'Jujutsu' come to imply Brazilian Jiu-jitsu?).
I think it all comes down to marketing - and whatever else you say about the Gracies, they've been hugely succesful at promoting their art worldwide (and particularly in the States) in a short space of time. I think this alone is one of the main causes of 'BJJ-bashing' amongst traditional MAists (TKD suffers from this too).
My impression FWIW (and it's mostly gleaned from the 'net, so beware! ) is that in the USA BJJ has probably already supplanted JJJ in the public's eye.
In Europe, I think the term Ju-Jitsu had stronger public awareness to begin with. Britain already has its own indiginous style of JJ, and in Europe JJ is very often taught right alongside Judo at Judo dojos (and Judo is extremely popular).
Personally I don't care whether people think what I study is BJJ or JJJ - particularly since I just got my blue belt and that seems to carry a certain amount of kudos in the BJJ world!
Cheers,
Mike