diberry - 5:52 pm on Nov 13, 2012 (gmt 0)
I could maybe act as a control in the experiment...?
I had a site hit hard by Penguin, but I never built links to it and the people I've shown the site to agree my backlink profile doesn't appear to be the problem. So, following Google's instructions which say to use disavow only if you have LOTS of links that need removing (which I don't) and are sure that's your problem (which I doubt), I did NOT use disavow. If I see improvement while people using disavow don't, or vice versa, it might indicate something.