The PR scale is said to be logarithmic, like the way we measure earthquakes. I have seen a view that each PR point means that the PR is 6 times more "powerful" than the one below it. So perhaps the logic is that 6 PR3 backlinks are worth as much as one PR4 backlink.
Barry Welford
Edited by bwelford, 27 August 2003 - 04:58 AM.










