Yep, though it's weaker evidence to observe that (straight) female rationalists don't go back when they can have their pick of mates and/or an entire harem by staying.

Actually, I have seen a couple of cases of women using their newly acquired Sanity Attractiveness Points(*) to pull in hot guys they want from outside the community, though in both such cases they still had rationalist mates on the side.

(*) = According to the one woman whose case I know in detail, this is apparently a pretty strong effect - a female from within rationalist culture, dealing with a guy from outside rationalist culture who has an unmet need for sanity, may appear unto him as a Goddess. Sort of the dating equivalent of what happens when people with unmet needs discover LW or read HPMOR.