Well, obviously I'm not a mind-reader, but as a Jew and an atheist the way I understood the use of that line in that context was not as a representative of Christmas (which it doesn't mention), but on the basis of its thematic appropriateness in isolation -- since it has the verb "tell," a synonym of "narrate" (the whole point of the fic exchange), and "Yuletide treasure" is what the participants get, in the form of fic tailored to fulfil their own wishes.

Don't get me wrong, I'm not preaching a "you jews are overreacting" message here, I'm just saying that -- while having the sign-ups on a holiday when many people can't use their computers WAS an oversight, and one I'm sure the mods will be careful to avoid in future -- I thnk that's quite a different issue from the question of whether or not the use of the term "Yuletide" is itself Christian-o-centric, a much weaker claim (and unlikely in this specific case given that as far as I know at least one of the Yuletide mods is actually Jewish).

And in any case, my point is not that it is or it isn't, but rather that I didn't TAKE it as such, nor do I think it is necessary to take it as such -- I defend my interpretation as both reasonable and in no way the product of Christian privilege, since I don't have that privilege.