Mine increased from PR 2 to PR 4 in a fortnight!
I don't think PR means anything anyway to be honest (please correct me if I am wrong), I have a PR5 homepage with PR4 internal pages, some of the internal pages are optimised for certain keywords and I am not anywhere to be seen on google, although other PR3 sites are on page 1 for the same keywords!
So work that one out :icon_dunno:
Mine seems to have dropped from PR5 to PR4 anyone else?