There is an undeniable chasm between the traditionalism of France (the birthplace of the movement) and that of the United States. One could write a long blog post on the matter and why that is the case, but videos demonstrate it much more clearly.
On the one hand, we have a Mass at St Nicolas du Chardonet for (presumably) some Sunday after Pentecost. Note the singing of the people, the music of babies in the background (Cryrooms can go back to the hell from whence they came, as far as i am concerned!), and how nothing here feels like the people are putting on a fake subculture that is not theirs. This is their culture and their faith.
In contrast, this is how American traditionalists celebrate the Nativity, one of the most solemn of feasts in the Church.