I am a former weekly serving RC, and have lived in a heavily RC area for over 60 years, and in addition have abundance of statistics , and the reality is that it is evangelical faith that effects manifest regeneration, while deadness and liberalism reigns where Rome does. Or blind zeal.I remember going to see Rick Santorum in Glendale Heights, IL, and the crowd was mostly evangelicals, and they were a good group to be around, yes, very much alive in their faith, but the problem I see with your deduction regarding Catholics is the word "weekly." In order to see the true zeal available to the Roman Catholic, you must participate in the Sacraments more than once a week.
Oh, so that's it. Which likely constitutes about 5%. Less 25% even go weekly. Sorry, i don't buy it.