webindia123 - 9:53 am on May 5, 2012 (gmt 0)
Having personally experienced huge drop of SEO traffic in one of our bigger sites; which was authority in that domain. Also one of the leader from the market's point of view. NO BLACK HAT ever done. Mostly optimized with updated on-page content. Still age factor didn't saved it. I cannot shorten more than this :p
And seeing above scenarios; one WONDERS what Naveen Panda was smoking when he lead his team to make recent updates.