When I was in college, the Catholic student center had a very left-leaning Mass run by a liberation theologian. Think liturgical dancing. The church was completely full - standing room only. When I left, I went to a middle-of-the-road parish in a middle-class area of a large city. Standing room only. My local parish is a conservative parish in a suburb.  Standing room only.

I wonder if progressive and traditional Catholics are overestimating the appeal of their particular brand of Catholicism and underestimating the appeal of convenient Mass times.