None of these questions directly measure "rationality" in any real way. The most you're going to glean from such data will be a demographic slice of the readership of LW/OCB. Now, I imagine this group will be somewhat more "rational" than average (if only due to higher "g," and the presumed correlation between the two; I wouldn't even be so quick to ascribe greater rationality to people professing an interest in the concept), but it's patently silly to equate "being a reader of LW/OCB" with "possessing the quality of rationality."