There's nothing surprising here, but Brookings has a new report out about the fate of religious progressives in the political arena (short version: things don't look too hot), and it includes the data on the right about the demographics of religion in America.
Bottom line: religious conservatives are old. Nearly two-thirds are over 50. Conversely, the unaffiliated are young: two-thirds are under 50. But what does this mean? There are two possibilities:
Take your pick.