I could have sworn that this game was delayed to 2014.
"THQ announced South Park: The Stick of Truth has been delayed. The game was originally scheduled for release on March 5, 2013. The game has been pushed to early fiscal 2014. THQ's 2014 fiscal year begins April 2013 and ends March 2014.
[Update: THQ said the title has been delayed 2 months]"
That's taken from Obsidian's Stick of Truth forum. It's something about THQ's financial year being different from the actual year itself.