Put any search term into google, look at the top 10 results.
You will have various
pr some low,some high, some none, for the web pages that come up.
Then look at the next 10,some high, some low, some none.
Same again.
Google
pr is now very low on relevence , which is why when you look at backlinks for your site in Google you will see fewer than if you look at the backlinks on other search engines.Google is aware that the easiest way to boost
pr is to just buy a couple of high ranking links.