From this list of authors by number of quotes, I can't distinguish this collection from a collection that is exclusive to quotes from men (and unnamed sources).
I ask to be shown a distinction, i.e. a female who was quoted seven times or more.
Or just once, really. I haven't seen even a single quote from a female when skimming the main list.
So, I think my favorite female public rationalist is Byron Katie, who has a number of great rationality quotes, most of which boil down to this one (which is I think her only quote in the LW RQs):
When I argue with reality, I lose -- but only 100 percent of the time.
Close to it is one by Karen Pryor:
Nowadays many educated people treat reinforcement theory as if it were something not terribly important that they have known and understood all along. In fact most people don't understand it, or they would not behave so badly to the people around them.
Ab...
Here is the 2013 edition of the Best of Rationality Quotes collection. (Here is last year's.)
Best of Rationality Quotes 2013 (400kB page, 350 quotes)
and Best of Rationality Quotes 2009-2013 (1600kB page, 1490 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.
As is now usual, I provide various statistics and top-lists based on the data. (Source code for these is also at the above link, see the README.) I added these as comments to the post: