I've some sites. I use google webmaster tools and google analytics in some of the sites and on other sites I use other third party tool except google. After Panda and Penguin update, I saw that some of my site lost its ranking, especially those sites which was linked to the Googles tools(webmaster tool, analytics). On the other hand, other sites which was not linked to Googles tools, is doing well. After some testing, I've decided not to use Googles tool. Also I'll not submit my 'Image/Video Sitemap' to Google. Please share your personal experience - about Google tools. Am I right or wrong?