Hannahness - 1:04 pm on Aug 29, 2010 (gmt 0)

I do have to add, however, that I see a lot of reputable SEO's who have the ability to surmise based on search engine behaviors and trends that they've observed because they've been in the industry for so long - this is without testing. for example, the Mayday update - I don't know of anyone who did much conclusive testing. I've only seen observations re: lost long-tail traffic, although I could be wrong there.