Ex-Catholics are too diverse to be rated a "larger congregation." Some are included in the "none" category while others joined many other religions, making their excommunication official. If the latter have any membership in a congregation, it is with their new found religious congregation, not in some unlisted ex-Catholic membership. Likewise, ex-Protestants, if one were to include them. Remember, US Protestants today are barely 46%. In 1960's, they were 65%. Ex-Protestants certainly outnumber ex-Catholics in a "larger congregation," if you think in such a pseudo- category. Only the Nones can boast of significant gains as they continue to grow. The Nones are in antagonism with all organized faith traditions. They are truly the new "larger congregation," with many ex-Catholics among them.