Forum Moderators: Robert Charlton & goodroi
The Sandbox is where you cannot RANK IN SERPS.
PageRank is a value derived from the number of backlinks any given page has (modified in lots of ways, such as prominance, repetition etc). Internally to google, PR is extremely accurately calculated, iteratively, several times as day.
Toolbar PR (TBPR) is somewhat related to actual PR. However TBPR only gets a major 'push' (update) about once a quarter, with some people reporting mimor change in between. Some things to say about TBPR- its not necessarily accurate, its definately not current (apart from the first week after the push), it can be buggy, and G also use it to 'give a message' to the page owner by grey or white-barring a page that clearly has real PR.
So yes, messy. And even messier if you do not get a clear distinction in your head about thise three things
1) TBPR
2) Real PR
3) SERP Ranking.