Hi I constated that google started to ignore hight traffic pages and placing it in the ingored case , otherwise gives alot of importance to spam websites . Non of the previous methode of seo works ( pagerank , backlinks , unique content ...ect ) the new algorithm is CRAZY !!! and have no logics also it the seemed to drop a lot of sites that used outdated ranking techniques, especially those sites that had lots of links coming in from unrelated websites. But to be honest right now nobody knows exactly what has happened, people running multiple websites with the same SEO strategies are seeing some sites hit and not others. did you feced such problem ? especially drop in traffic in you Top traffic websites ?