atlrus - 5:12 pm on Aug 9, 2013 (gmt 0)
No one is talking about adoption across the web. The point is that once a website implements GA - Google has 100% visitor information about that website, regardless of browser or ISP. The data already comes well-organized and ready to be used.
While they will not get 100% of the web, they certainly know 100% about that particular website and could use the information either directly (affecting that website) or indirectly (across the board).
Anyone who thinks that Google, having this perfectly structured data, will not use it, is simply naive.
P.S. Don't get me wrong, I'm not saying they only use GA data, but that they use ALL of them - GA, chrome, WMT, etc.