I tend to agree. If I don't like a holiday fic, I just don't comment at all. What's the point? It's a gift, and concrit -- even good concrit -- is often in poor taste because it devalues the gift to the person receiving it.

After all, would you really appreciate gift!art if all of the feedback was something like this:

"Wow. You can... umm... draw straight lines quite well" or "That would have been great, but your color choice left a lot to be desired and the edge's of Harry's glasses look smudged."