icedowl - 1:16 am on Oct 27, 2004 (gmt 0) Added:
I don't think it has any direct relationship to PR. However, both PR and the ads you get are both directly related to your content and how well it is written. IMHO it all boils down to the words you use and how well you use them. More and better content allows for better targetting.
Four words: content development & semantic diversity.
Marcia hit the nail on the head!
As an aside, I've seen ads that were targetted to the "alt" text of an image when the content could not be easily targetted. Example: Gardening supplies ads when the images were of fruit (none of the content mentioned any sort of fruit, plants or other vegetation).