Not sure. My guess CPAMan would be that a lot of people taking the CPA may have already had a lot of exposure to economics so it just seems like easier material and is more of a review of old info then learning new things such as some things in the other sections. Also in general managerial accounting was easy as hell. For me, I passed BEC on 3 days studying the first time. I took more time the second time because I did not want to be over confident but still much less time then I spent on any other test and I did much better.
BEC - 75(expired), 79
REG - 63, 54, 61, 69 (Gave up for a year. Finally decided to really study) 73, 78
FAR - 70, 71, 73, 83
AUD - 61, 72, 72, 76