indyank - 5:49 pm on Jun 23, 2011 (gmt 0) [edited by: indyank at 5:59 pm (utc) on Jun 23, 2011]
signed out searches mean that your activity can be tracked only at the browser level and not on Google's database. Algos have nothing to do with personalization.
Google does expire cookies often and it isn't that the cookies remain always the same.
[edited by: indyank at 5:59 pm (utc) on Jun 23, 2011]