My best guess as to what has been happening lately with GMAC and Pearson Vue is that prospective test-takers were upset about the online ("OnVue") whiteboard requirement, so many/most of them were avoiding the online exam. This meant that for those of us who were brave enough to take the early version of GMAT Online without a physical whiteboard, our scores often arrived quickly (mine came in less than 48 hours).
Now that GMAC has finally caved and given in to the public pressure to allow a physical whiteboard, there has surely been a surge of new test-takers, not to mention those of us who are taking advantage of the physical whiteboard retake option. I'm sure that many of us were hoping to receive our scores before the 4th of July holiday, for example, but even though I took my physical whiteboard exam on June 23, and GMAC says "7 business days," it has now been longer than that, yet I still have no score in my mba.com account, no email from GMAC, nothing. Meanwhile, many students are still having test registration problems as well.
Thus, it appears that GMAC and Pearson Vue are currently having trouble keeping up with demand for the physical whiteboard GMAT Online--and that in some cases, you should now expect scores to take longer than the promised "7 business days."