It's a pretty recent release. I doubt any professional print mag has a review yet. Hell, some of them are still reviewing stuff like the Denon 3801. I don't know what the deal is with Audioreview.com but new stuff just don't get their own page anymore. Some stuff that's been out for over a year now still haven't, so people are often posting reviews on the previous model's pages.
I recall a couple of people here and some onwww.hometheaterspot.com that have had a 5.2 for a while now. You may just want to ask them directly.