Of course- here is a simple test. Go through discussion threads classifying them as apparently novel/not novel, and attempts to test ideas/conjecture. Check ratios. Compare the karma of the different categories. Obviously, its not a perfect test, but its good enough to form the belief I shared in my post.

And of course, I didn't suggest that every idea needs to be formalized or tested- merely that there is not enough present here for Less Wrong to develop from a source of popularization of other's ideas into a forum for the creation of novel ideas about rationality.