@fathom- could you reference the above, I can't find it.
Brands get a pass on a lot of things. Plenty of brands have thin content and sailed through Panda. Many have high concentrations of IBL/exact match anchor text and sailed through Penguin. Chances are that Google doesn't use them for trophy keywords , preferring to rely on on-page signals, rather than who with the most links - just my hunch.
@Ralph_Slate - I'm voting that your Penguin penalty threshold was eclipsed around the revival date with brand signals around your reputation keywords.
What about referring links? Did any of those sites pick up around that date to assist in the regaining of authority back to your site?
Did the keywords that you lost return, or did you get different ones? [ I assume they were the same/similar ].