From what I see, pages full of PR at the top, pages without PR are at then end of the results. It’s black and white what I am reading from the results – I guess people could try it on their own site and compare results.

It will be interesting to see the next toolbar update and how the scores correlate.

You say this: “PR fluctuates wildly on internal pages especially at the lower end of the scale, CONSTANTLY”

My guess is that Google doesn’t aim to sort everything absolutely perfectly. The difference between a page with PR 1.222 and PR 1.225 is small enough that Google doesn’t necessarily need to spend the computing power to put them in perfect order…right? It would make more sense to make sure that everything is generally in the right place, within five spots or so, then precisely sort the top results.

Along that same line, it could be that Google’s sorting ignores anything after a set number of significant digits. So, pages of 1.22223 and 1.22224 could have functionally the same value, which means that either one could end up before the other.

Or maybe the difference in PR is so small that you’re changing it just by observing the results? Typically, it would take data from hundreds or thousands of searchers to affect the order of the results, but once you get to the lower end with relatively little PR, maybe it just takes one person?

Just thinking out loud; these are definitely just guesses.