A tweet from Chair, Fireplace, etc. led me to this article questioning the link between the health of YA as a publishing category and the assumption that it means teen reading is flourishing. Every time I see The Book Thief on bestseller charts I wonder about this correlation, and I also think the question speaks to the thriving (thanks, all) conversation we've been having about blog reviewing and how it differs from print. Save for the odd review in VOYA, all major print reviews of YA are written by adults for an audience of other adults selecting books for teens. Blog reviewers include both teens and adults, and more often than not YA blog reviews don't speak from or to a gatekeeper perspective--the reviewer treats the book as one she has (or, more rarely, has not) enjoyed and recommends (or not) to those reading the blog, with no "for your kids" implied. This may be why meta-discussions of blog-reviewing get so heated: it's personal.
I don't wring my hands about adults reading YA as much as I used to, but before you go thinking I've become more generous of spirit take a look at the article linked above--maybe YA books are simply adult books with more appealing covers!