Originally Posted by JB3

you get this fact from wikipedia?

other sources differ. This article thinks more like between 10 and 20%.

How Many "Real Christians" In North America? - Theologica

excerpt-

"I had a feeling that the popular statistics were misleading (Wikipedia - 76%
of Americans are Christians...palleeeaaase!!), so I dug a little
deeper. The Gallup polls indicate that 40% of North Americans indicate
that they attend Church regularly, but I found that number to be very
suspect, so I dug a little more.

An article by Christianity Today deemed "Statistical Illusion" indicates that many lie about their Church attendance (no
way!!), and indicates that only about 20% of North Americans attend
church regularly. The Ontario Consultants On Religious Tolerance did an in depth study
and came away with roughly the same percentage - 20%. And Dave Olson,
the director of church planting for the Evangelical Covenant Church has a very interesting
slideshow that indicates church attendance in the United States at
only 18.7%.

So, 20% huh? Not so fast. What I want to know is how many are really "practicing Christians." Everybody (well, most everybody?) knows that
not everybody in a Church is a Christian. So how many of that 20% or so
who regularly attend church are really "committed Christians" and not
just "pew-warmers"?

I was talking with one of the Pastors of a large local Mainstream church (5,000 members or so) here in the Dallas area last fall, and he told me
that he figures that only about a third of those in attendance on any
given Sunday are confessing Christians.

A third?!? Surely not?

If that number is true when averaged out among all churches in North America, that would mean that only 6% of the population in North America
are true-blue, confessing, practicing Christians! "