Yeah, advance review copies are treated pretty differently, from what I understand... getting them gives reviewers a leg-up on the hoi-polloi who have to wait until a book's released to read/review it. If publishers don't feel a reviewer gives their writers a fair shake, they can simply make them wait until the official public release to get their hands on a copy. It's pretty standard, really, and part of the whole publisher/reviewer dance. Someone fucking up an orchestrated public relations arrangement that way is going to get a lot of attention and any publisher's PR department is going to be battening down the hatches and trying to figure out did it. If they aren't actually company insiders themselves (as some of the wank has implied) they may have just cost whoever gave them a review copy their job.