Msg#: 3362032 posted 3:35 am on Jun 10, 2007 (gmt 0)
PR is Google's method for rating the power of links, and it's calculated by their own patented method. So the actual PR number belongs only to Google, as you noted.
But if Google shows a high PR number for a URL, that means it has a healthy backlink situation. So in many cases that URL will also have good ranking in other engines. This is not because the other engines use Google's PR formula, but because they also measure backlinks, each in their own way.
Msg#: 3362032 posted 3:51 am on Jun 10, 2007 (gmt 0)
For my own sites, if the other search engines vanished I'd hardly notice, and Google is effectively the only search engine. However, although PR is just part of Google's formula it's still an important part.
Msg#: 3362032 posted 2:31 pm on Jun 14, 2007 (gmt 0)
I have PR 3 and 4 on pages with NO direct inbound links, so it can't be only related to this. However, regarding the SERP's, often is the case that a page with a lower PR is shown higher in the listings. IMO SERP's ranking is more related to keywords for any given search query. PR may have some bearing but nowhere near as much as some seem to suggest it has.
I have pages at number one on the SERP's where there are millions of results showing, but the PR of those pages is much less than on listings further down the SERP's.
I do believe, however, that new websites need to acquire some level of PR before they are correctly listed in the SERP's. But that is purely a matter of search engine robots spidering the site properly once it has been established for a while.