MrSavage - 11:37 pm on Nov 6, 2011 (gmt 0)
I just wanted to add that it's almost irrelevant if you log out of your Google account, change your IP, clear cookies, etc. The point is that your potential customers are not logging out of their accounts and most likely most of them don't pause their history. The obvious trend is toward more and more people participating in clicking +1's. It means the pool of people using unbiased, uncooked results is getting smaller and smaller. The greater the Google+ integration, I foresee less and less benefits from a clean, unbiased search result position. There simply will be fewer and fewer people getting a "clean" view of Google search results.
Said in a more simple way, there is quickly becoming millions and millions versions of page 1 search results for each and every search phrase.