I'm pretty sure Guilty Crown was big during the Fall 2011 lineup.
Yep! The video sales on this title have been pretty strong in Japan.
For more proof, the latest Japanese Blu-ray sales data is out.http://www.animenewsnetwork.com/news/2012-02-28/japan-animation-blu-ray-disc-ranking/february-13-19
Volume 2 of Guilty Crown released out last week and sold over 6,000 copies. According to a few Japanese anime companies, selling 1,000 copies (of each volume) is the "break even" point. IIRC, the first volume of Guilty Crown sold over 8,000 units in two weeks. This volume may very well reach that point by next week.
In a nut shell, Guilty Crown is selling pretty well.