Personal page on Twitter of Matt Cutts he announced the launch of Penguin 2.1 and it will affects ~1% of searches to a noticeable degree.
Penguin 2.1 launching today. Affects ~1% of searches to a noticeable degree. More info on Penguin: http://t.co/4YSh4sfZQj
— Matt Cutts (@mattcutts) October 4, 2013
Have you noticed any changes in your website ranking on Google search engines?
Note Update: How to overcome Google penguin 2.1?