I'd prefer longfic, because all of my gift fic so far has been under 2k and of the introspective character study, retelling of canon scene, or snippet of something larger variety that I'm just not fond of. I don't really hope for anything in the 3k+ range because I know most Yuletide fic isn't, but it'd be a nice surprise.

Agreeing with the other anon, though, if my fic is under 1050 words (and especially under 1010 words) I tend to worry that the author had trouble meeting the minimum and padded it with adjectives or an out of place filler scene. Not always the case, but I'd worry while present shaking.