Don't tell me you really believe that all those sites that happen to be google affiliated really have that much standing in their algorithmic view of the web. Google has been artificially inflating the ranking of their own site for a long long time.
For instance, not that I'm in the habit of searching for celebrities, but type in paris hilton in the google search bar.
The first result is a link to google images, followed by half a page of sample images from images.google.com, followed by wikipedia (ok, that's a good one) and then a bunch of youtube stuff.
I'm sure they're all 'relevant results' but I highly doubt those image links are really the most relevant results on the subject.
The wikipedia link should have been #1, the images and youtube results probably don't even belong on the first page (unless you search for 'images').
This sort of thing will happen with a great many subjects, but with a high frequency query like 'paris hilton' the effect must be enormous.