netmeg - 8:00 pm on Mar 9, 2011 (gmt 0)
LOL, Planet13, I beat netmeg by about half a day!
That's why you're Dazzlin'
then it's more likely that Google has a set x weeks penalty or maybe they haven't really done a serious re-calculation of the SERPS.
I've seen nothing to indicate the former, and I suspect tweaks and recalculations are ongoing.