Steph Su wrote a post just a couple days ago about how she wants to see more Asians on the cover of books. I highly enjoyed her post and even read some of the wonderful comments she recieved. One of them mentioned seeing a post about books with plus-size characters but not plus-size models on the cover.
Unfortunately, I did not see this particular post...but I do remember that in a copy of Entertainment Weekly they showed off some Chick-Lit covers that had much smaller models on the cover than in the inside of the pages (and I'm sure you'll see some of the ones they mentioned below). I think readers are more mature than this too...and I would personally like to see more covers with plus-size models. They exist in the world. Not all girls (and guys) are thin and beautiful looking. Just like there should be more covers with Asians and African-Americans and any other race that is written about, there should be covers where the models depict realistic girls. I'm not saying all books, but if the book has a plus-size character, then please show one on the cover!
I mean, look at the cover of Big Boned by Meg Cabot. Yes, she has some slight curves...and no, her dress won't zip up! They are showing that she is meant to be a bit bigger...but honestly, the model still doesn't seem like she's plus-size to me. I think it's the dress and the fact that she has hips that give that impression more than anything. And why can't we see her face? Is it because she'd seem much smaller from the front? Who knows? But I have a feeling it might be part of the case...