What does a "non-denominational" Protestant believe?

I have heard "non-denominational" Protestant churches identify themselves as such because they believe they are above the squabbling and blindness that characterizes denominational Christianity. I have heard Christians identify themselves as "non-denominational" because they aren't really loyal to any particular denomination at the moment. I have ***also*** heard from ***non-*** non-denominationals that "non-denominational" is in essence a denomination of itself, because churches of this identification are actually related in their origin, theology, etc. **Is that true?** Are there any distinct characteristics of non-denominational Protestant churches besides the name?