As to the nones, the same Religion News Service has an interesting article on those among the nones who do have beliefs in a higher power. Of course, depending upon the nature of that belief in a higher power, that can still constitute a religious belief.
The percentage of Americans who do not identify with any religious tradition continues to rise annually. Not all of them, however, are atheists or agnostics. Many of these people believe in a higher power, if not organized religion, and their numbers too are steadily increasing.