Catholicism is a culturally "thicker" religion, which I suspect is responsible for the trend of lapsed Catholics continuing to describe themselves as Catholic i

Catholicism is a culturally "thicker" religion, which I suspect is responsible for the trend of lapsed Catholics continuing to describe themselves as Catholic in opinion polls even when effectively Nones. If you operationalized the definition, say by asking "have you been to church in the past week?" you'd probably see more similar trends.