While I did not make a thorough study of it, I looked for data and found at least one article which says the “gender gap” among active Catholics has narrowed or even closed up.
The bad news is that it has narrowed because participation of women has declined, while the participation of men, though lower in past decades, has held steady.
Huffington Post: U.S. Catholic Women at Crossroads as Gender Gap Disappears: Will Pope Francis Make a Difference?
… But the milestone findings they present from five studies as part of the American Catholic Laity Project, a national survey taken every six years since 1987, suggests this is no longer true.
Consider the rapid declines in commitment among women, while men’s level of commitment remained fairly steady:
• In 1987, women were almost 50 percent more likely to attend weekly Mass, with 52 percent of women and 35 percent of men attending regularly. In the 2011 survey, less than a third of Catholic women, the same proportion as men, reported attending weekly Mass.
• In 1987, 58 percent of women, compared to 39 percent of men, said the Catholic Church was among the most important parts of their lives. By 1993, the percentage dropped to 49 percent for women and 37 percent for men. In 2011, just 35 percent of women and men ranked the church as one of the most important parts of their lives.
• The percentage of women who said they would never leave the Catholic Church declined from 61 percent in 1987 to 55 percent in 2011, while the percentage of men claiming such loyalty rose from 50 percent in 1987 to 56 percent in 2011.
I hesitate to make any generalizations, but I think we should try to understand the changes which are taking place.