indyank - 3:39 am on Jul 31, 2011 (gmt 0) [edited by: indyank at 4:03 am (utc) on Jul 31, 2011]
Not all users have a fixed IP...In fact, majority of web users have dynamic IPs. If you say that they can use something like IP + machine identifiable info through those cookies, it might be valid to some extent.
But remember that google never gives away IP of visitors in its analytics tool and I think they even say that personally identifiable information are not gathered. This could be applicable to any of their products.
[edited by: indyank at 4:03 am (utc) on Jul 31, 2011]