I agree with that, though I suppose the issue is that you are talking about organized religion specifically while I am talking about Christianity specifically. While it happens that there have always been people who reject organized religion, I do not think it would be controversial to suggest that apathy towards or rejection of the Christian God is more socially acceptable now than it ever has been in the past.
That doesn't suggest permanence. Religion might surge back in the next twenty years, it's happened plenty of other times in history.
Of course, that doesn't necessarily mean a Christian surge. In twenty years we could become a Scientologist nation