Don't know if someone posted this link earlier, but according to Bleeding Cool, the sales for House of X/Powers of X have remained incredibly strong in comic shops. This is in line with some of my recent experiences trying to get variants at my local shop. For the past five weeks, they've sold out completely and only have several issues left. The guy who runs the shop says that a lot of lapsed X-Men readers have been jumping aboard this book and have been loving it. It shows just how great this story is and how much greater it can potentially be.