We don't really have any theories behind the enormous improvement in CPA exam scores for 2012; maybe it's something in the water, maybe it's that the exam is getting easier like all the old school paper-and-pencil people say, maybe it's that shift in consciousness the Mayans promised. Whatever. They're up and that's what matters.
Here are your 2011 rates in case you forgot:
What is up with BEC, huh?
2012 CPA Exam Pass Rates Released [Another71]