tangor - 10:43 pm on Feb 28, 2012 (gmt 0)
I'm going with the report of "things changed in February" which suggests to me that end of March we might have some historical data upon which further speculation might be generated. That said, I've always built sites for users, not search engines.
Page Rank was the one thing G invented that actually made sense for growing the web, commerce, and authority... and was the first that was scammed/trashed. A bright idea with no controls to prevent abuse. Some of these new changes seem (to me) an attempt to make PR actually work again, but baby steps with hard rules attached. Might make a difference if that balance can be achieved.