Honestly, it's not surprising. There are presently 16 votes in the two 'found it out somewhere else' categories, which is greater than the 15 saying they figured it out after reading one or both of the books. That means less than half of readers picked up on this particular detail on their own, so there should be people who haven't discussed this particular aspect on this or some other board or site stumbling across the knowledge for the first time. I'd be very interested in a close reading of the two novels to see if any thing in Sacrifice or Revelation specifically states that Goran and Medrit are married, because if there isn't, if it's only in Practical Man, then Traviss really did dodge the issue, because somewhat unusual living arrangements and plenty of chummy closeness are all over the Mandolorian characters in her books. I'd do it myself, but I'm simply not masochistic enough to pick anything from LotF up again.