I just want to clear up some terminology. We the website owners are considered the
publishers when it comes to AdSense. The
advertisers are the people whose ads we're hosting.
But yes, Google is definitely more concerned about protecting the advertisers because that's where the money comes in. IP addresses are never a fool proof thing to track because as we know, people can have the same IP address (i.e. employees at a corporation, etc.). So I'm sure from time to time we aren't awarded for valid clicks but hopefully it evens out in the end.
I guess we'll never know.
