tedster - 3:36 am on Oct 14, 2011 (gmt 0)
I'm not so sure about using Alexa data for this kind of analysis. Check out the two HubPages graphs on this Searechmetrics article (scroll down below the party pictures).
I appreciate that Searchmetrics data is based on how many search terms have good rankings for the domain... and that does not necessarily translate into traffic. But it is a pretty decent approach to viewing whether Pandalization is being lifted or not.