[@Maxwell] Ok, so, seeing as there is either a) a lack of source material for WH elves, or b) there's loads and I haven't see it, and since WH elves seem to be very similar to Tolkien's elves and D&D elves, I think it's safe to assume that they 'sleep' the same way.
Since there are probably quite a few 'rules' that some people think elves should or should not follow, I think that I trust [@Jbcool] to play it well, and just go with any character descriptions he has. It shouldn't make too big a difference, unless he starts flying. Then maybe they'll be questions. But so far, I think he's done a good job.
So, to conclude, let's just go with stuff and trust people to manage their own characters. Now here's a smiley face, because I want us all to be happy. :)