There was a thread in message board somewhere in which someone was lamenting the absence of Gracie Barra medalists.
Clearly this person was focused on the adult black belt division only. If you look at the overall point score for adult, masters and seniors, and female divisions combined (novice and juvenile excluded), you see a very different picture:
Gracie Barra 156
Gracie Humaita 141
Alliance 118
BJJ Revolution Team 72
Lloyd Irvin MA 70
Atos 42
If you include all divisions, then Gracie Humaita edges out Gracie Barra by about 6 or 7 points. But those gains come from the novice division exclusively and, at the end of the day, I'm not sure what to make of a novice division championship.
