Traddies aside (they're not who I've had in mind), the parishes that have at long last gone not pre-V2 or post-V2 but exactly V2--the ones at long last doing exactly what Vatican II called for in sacred art, architecture, liturgy, and lay involvement / common priesthood of the faithful--seem to be doing better than congregations still stuck with the disorders and wreckage Eugene Walsh, Rembert Weakland, Virgil Funk, and countless others imposed in defiance of the plain letter of Vatican II.

I have in mind congregations like OLOP, the cathedral parish in Santa Rosa, Cantius, or Sacred Heart in Grand Rapids.

These congregations produce vocations, keep their 20-somethings,  have a much more even ratio of men to women in the pews, and they evangelize.  Of course, one would need some hard data to rule out a self-selection effect, and bishops are reluctant to collect such data for the obvious reasons.