dunivan - 7:39 pm on Oct 5, 2011 (gmt 0)
They don't care about false positives, they care about famous false-positives that can give them bad press.
I doubt they care about famous false-positive damage, hence the touch and go nature of the update itself, if they cared they would test it to death, and results would actually be better. One of my clients actually has an exact match domain, with decent PR, and thousands of good links being out ranked by an e-zine article.
edited: word omitted