Google is spying on so much data, they use all kind of device tracking, location tracking, history tracking, OS tracking, browser tracking, proxy tracking etc etc and they stuff persistent cookies which stays on your computer no matter if you clear your cache, browse in incognito etc. I think in 2014 it is impossible to build such bot without getting the G attention on you. Just install Universal Analytics on some site and see how much user data Google is having for your visitors across tons of websites - they gender, interests etc etc etc Good luck, but don't feel bad when you see you can't hide your footprints. We are not 2008, world is changed.
Its not the same to talk about Google or to talk about Google Analitics.
Also, a persistent cookie could be deleted if you clear your cache,
there are no cookies that stay on your computer againstall your will.
The location tacking its modified when you change your IP, the history tracking cloud be deleted.
I can say the same thing you said, but in he oposite meaning:
we are in 2014.
Today there IS
NO WAY (its even against the law) that Google or any other company do the kind of things that some conspirancy theories want to sell. But please, do not make this thread a war about Google and its "secrets" methods, etc. I respect your opinion, i dont share it, lets stay in that point please.
Also, im not using IE in my software, mainly im using my own internal browser and i can manage in my browser the cookies, and every information i send or receive 
I will not reveal here my method but i know how to avoid all this cookie stuff at 100%. Its not magic, its simple knowledge on how the browsers works.
The cookies are written by the browsers, they receive the informaton and they write it. Google cant bypass this, its depends 100% on the browser. If you browser do not write cookies, like mine,
there is NO WAY that Google send little gizmos or Smurfs that write the cookies.
Again, i will not reveal my method, but my method works even in Internet Explorer, maybe in a future i will release a small and cheap app that can make you avoid this cookie stuff, 100% secure.
All the information about you (except the IP) that Google receives... is sent by you browser... everything... yor OS, resolution, refferes, etc. And browsers can lie. One of the first thing you learn is: never trust in the information sent by a browser. Google has no ther way to kown information about my computer, other that the one MY broser sends... Poor Google.