Earlier quoted context omitted.
But Jo(e) User doesn't really care about that, he or she cares about search results. If (and admittedly this is unproven) Google can deliver better search results by logging and analyzing search activity to personalize results, then Cuil is already at a disadvantage.
How can you call it unproven? When I google for Python I get stuff related to programming because of my search history, when a zoologist looks for Pythons he'll see stuff related to snakes.
I'm a Python programmer too and the first link I get from Google for 'python' is a Wikipedia article on the Delphic Oracle... Admittedly I have often searched for content relating to Oracle databases!