This is an interesting thread, think I will put another spin on it.
What about people like me who have experienced God first hand. Now while I know God exists I can not prove it. There are millions of people who have experienced God, or at least some sort of higher intelligence. Near death experiencers, thousands of them, and just plain ol' folks who for some reason or another see the light.
http://www.aleroy.com/board221.htm
Now you could say these experiences are just illusions or something similar, but you can't prove it. Science has not proved NDEs are physical, in fact, there is more evidence that shows they are not.
So we have atheists who think God doesn't exist.
We have agnostics who don't know.
We have theist who believe God exists, and we have experiencers who know God exists.
Very interesting mix, don't you think.
My vote goes to Atheists faith that God doesn't exist. Since His existance is not provable.
Love