(Legit sidenote: Google has, via the use of Analytics data, a mass coverage of clickstream for the whole web, which are default opt-in, follows you everywhere, and can identify you uniquely. The Bing Toolbar at least asks first.)
If this is the case, Google isn't being picked upon; rather, they are merely the first, who figured this out externally. Cookie for the scientific rigor, but no cigar for the way they PRd the story. Correlation, after all, does not equal causation.