An interesting response that I meant to post last week, especially in light of this quotation:
The Pew study founded that 79% of the currently unaffiliated --also known as "nones" in the survey--started off life connected with a religion. But get this: only 30% of "nones" who used to be Catholic and only 18% of former Protestants said they'd had strong faith as a child. This is true even for those who attended church regularly.
In other words, perhaps it's not that the devout have lost their way, it's that the nominally religious have stopped pretending to be religious. Perhaps what we're seeing is not an increase in the number of "nones" but an increase in the numbers willing to admit it.
Both this and the original article are worth reading.