I looked at the Chesterton quotes, they are all very rational, no discrepancy here. Here are the top ones:
It might strike people as odd, though, that most or at least half of those quotes come from books arguing for Catholicism. (They're really good! Can LessWrong start a Chesterton-is-awesome meme maybe?)
I created a 2011 update to last year's Best of Rationality Quotes collection. (Here is the original.)
Best of Rationality Quotes 2011 (360kB page, 352 quotes)
The page was built by a short script (source code here) from all the LW Rationality Quotes threads so far. (We had such a thread each month since April 2009.) The script collects all comments with karma score 10 or more, and sorts them by score. Replies are not collected, only top-level comments.
A year ago commenters asked for various statistics and top-lists based on the data. This year I re-ran the scripts I wrote to answer those requests. (Source code for these is also at the above link, see the README.) I added the results as comments to this post: