Well, actually, SW said "many" Americans, Chris, not "most". However, according to statistics, "many" is also far from accurate. Although the statistical information tells us it is not a firm number, it is still undeniably a small number.
A 2004 BBC poll showed the number of people in the US who don't believe in a god to be about 9%. A 2008 Gallup poll showed that a smaller 6% of the US population believed that no god or universal spirit exists The 2001 ARIS report found that while 29.5 million U.S. Americans (14.1%) describe themselves as "without religion", only 902,000 (0.4%) positively claim to be atheist, with another 991,000 (0.5%) professing agnosticism. The most recent ARIS report, released March 9, 2009, found in 2008, 34.2 million Americans (15.0%) claim no religion. Of which, 1.6% explicitly describe themselves as atheist or agnostic, double the previous 2001 ARIS survey figure. The highest occurrence of "nones", according to the 2008 ARIS report, reside in Vermont, with 34% surveyed.
The latest statistics show that a lack of religious identity increased in every US state between 1990 and 2008. However less than 2% of the U.S. population describe themselves as atheist.
This is why I find it outrageous that Michael Newdow, who as an atheist represents a miniscule portion of the American population, has filed multiple lawsuits hoping to take any mention of God out of our pledge and currency. And who knows how many atheists, representing that miniscule portion of our population, agree with him? Half? A third?