> Hopefully they do if they are using user clickstream data. Each domain should have something like a page rank to determine how trustworthy it is.

If there's some algorithmic reason to believe that Google gives more trustworthy results, that's one thing, and the pagerank weight can be empirically determined. If, on the other hand, there's some point where they explicitly treat google clickthrough data any differently (if site=='google.com' weight+=10), then that seems to have crossed a line.

I'm trying and failing not to have this sound like some kind of koan, but if you treat everyone differently in the same way, then that's (arguably) fine. It's only if Google gets some specific attention that it seems more malicious.