Depends on how you look at it. Culture evolves over time. There is the culture of origin, which has some influence. But so does the culture in which it is taught. Jiu Jitsu is heavily influenced by Japanese culture, which in turn influences the curriculum, the philosophy, and the training methods. Brazilian Jiu Jitsu is influenced by its Japanese origins as well as Brazilian sensibilities and culture, which in turn has a lot of influence over the curriculum, philosophy, and methods. BJJ is, as a result, very different from Japanese Jujutsu, and even from Judo. BJJ taught in America is different from BJJ taught in Brazil. The culture in the USA is different, the instructors are different, and so the culture evolved, shaping the curriculum, philosophy, and the training methods. This isn't monolithic, even within the same style, and in spite of any efforts to preserve the cultural integrity of the art.