One person posted a rant in the Google Webmaster Help forums about the "Top Contributors / Bionic Posters" in that forum. In short, Top Contributors / Bionic Posters are given the title by Googlers, who believe that these people are smart enough, experienced enough, skilled enough and helpful enough to be giving answered at Googler levels. But this person felt the Top Contributors / Bionic Posters were not helpful.
The interesting part of this thread is that Googler, JohnMu, does the right thing and backs up the Top Contributors / Bionic Posters with a really nice post. The post, kind of leads me to see that Google may (maybe stretching it here) consider the Top Contributors / Bionic Posters as "certified Google SEOs," if there is such a thing. Google does have certified AdWords professionals, Ad Manager pros, Google Apps, etc, but not Google SEOs, simply because it is something that would be considered very controversial on many levels. But in a sense, these Top Contributors / Bionic Posters are Google Certified SEOs.