I’ve seen others comment on this, and it does seem to be the case as far as I can tell also. It’s a little after the third anniversary of Summorum Pontificum, and one can almost trace an increase in vocations to that time. There was an increase after the death of Pope John Paul II, but the more recent increase is even stronger.
Also, some people are quietly returning to the practice of the Catholic faith. Some are being attracted by the “new” signs of renewal caused by the increase in the practice of the Extraordinary Form.
There’s no radical change, but Summorum Pontificum didn’t produce a radical change either. It just opened up new possibilities. It was not “turning around the altar,” but rather giving the “new” possibility of “turning around.”