Studies show that America is drifting further toward fundamentalism and mysticism:
Believe It, or not (CNN)
Religion remains central to American life, and is getting more so, in a way that is true of no other industrialized country, with the possible exception of South Korea. Americans believe, 58 percent to 40 percent, that it is necessary to believe in God to be moral. In contrast, other developed countries overwhelmingly believe that it is not necessary. In France, only 13 percent agree with the U.S. view.

Stats on Faith in America (also NYTimes)
The most stunning religion survey I found is the one in which 47 percent even of American non-Christians say they believe in the virgin birth. The source of that data is a Harris Poll from Aug. 12, 1998, with a sample of 1,011 adults. That survey found that 94 percent of adults believe in God, 86 percent believe in miracles, 89 percent believe in Heaven, and 73 percent believe in the Devil and in Hell.