I definitely make them more average... I also like making sim selfs, like my profile pic, which is me as a sim >v< I like to make family members too, and they look more average. I don't like when people try to make their sims all sexy. If I make a good looking sim, it ends up that I never play them.
Maybe Maxis is letting someone from thier team leak the info, and they know about it. Like, maybe they have one person that leaks stuff little at a time. It's like the announcement of it all, before the official one is announced, to keep us wanting the stuff. Then again, this all could be a lie.