That’s pretty close to the way it is Greek. Essentially it all boils down to the links. Since Dom pointed out that this is a very old site…It is estimated that the age of a link matures and is worth more to you the 3rd year you have it pointing to you than the 3rd day, or 3rd week or 3rd month. Google is all about determining relevancy, so therefore the older the site, and the longer the links are pointing to it, the more relevant it is deemed to be. Google also looks at traffic patterns on the site (via their toolbar), so they measure how many pages people click on and how long the stay on the site. This all goes toward upping the relevancy and the SERP position. Also a good reason to have a lot of useful and updated content. This description has strayed a bit from PR, but it shows how they are dominating the SERPS for the words they are optimizing for.