Of course. My comment was made as someone who 'doesn't know' but leans towards theism. And you certainly don't need religion to be a good person but as with any writings/teachings there can be value there. For example some people find the guidance of the writings by the Stoics useful. If we took the element of God out of the bible and distilled it down to useful teachings on life I wonder how useful non-religious people would find it. Would it be useful in a similar way to the writings of the Stoics for example?
http://en.wikipedia.org/wiki/Jefferson_Bible
Thomas Jefferson. Yeah... that Thomas Jefferson... not just some random dude with a common name.
There is a propaganda campaign to convince people that americans were united as hard core puritan evang neocon christians continuously from the earliest days until a very recent fall like when the Beatles arrived, but that fantasy has nothing to do with reality, of course.