A WebmasterWorld thread has dozens of posts from SEOs and webmasters claiming Google has made a significant update to the search results over the Easter weekend.
Webmasters noticed changes late Friday and throughout the Easter weekend, some as significant as over 40% changes in referrals from Google.
What can cause such huge changes?
(1) Less people online searching over Easter (and Passover) holidays this weekend?
(2) Individuals sites hit by penalties?
(3) Google released a major search update that might have impacted a nice number of sites. Maybe the over optimization filter was released over the weekend and Google didn't tell anyone? Or maybe not?
Have you noticed major traffic changes over this weekend? If so, what do you think it is?
Forum discussion at WebmasterWorld.