I found this article an eye opener. If you don't know what the problem with your site is since the panda update, you should read this: http://www.seomoz.org/blog/postpanda-your-original-content-is-being-outranked-by-scrapers-amp-partners
I am not gating any person those told me he find me traffic after panda update. But it is the big question in front of me if every one loos the traffic then who gain the traffic.
well after panda updation my sites are getting good serp so i am getting more visitors from search engines.