I'm referring to a drop in PR in multiple Chrome extensions that have always been reliable in their reporting. While they claim that there have been no PR updates in some time, there are obviously still some adjustments being made in some fashion -- manual or otherwise.
This is strictly a PR question. Nothing about the issue I'm describing is in any way (yet, after possibly a month) related to a drop in rank for any pages, for any terms -- nothing that I could point to as being statistically significant that is.
Some terms have risen, some have remained static, and some have dropped -- but nothing drastically.
There is no correlation between the terms that have moved and whether or not they are found on sites that appear to have been targeted or not. Likewise, there is no connection between terms movement and whether or not they are found on sites where we removed our links.
I have no knowledge of whether or not these sites have seen a drop in traffic or keyword rank, but I can assume with the observed drop in PR that they have seen these decrease.
In this instance, there were a handful of sites that we identified that we wanted to clean up -- these are the ones mentioned in my first post -- none of which dropped in PR, and no terms we were using in anchors showed any real movement.
Of the group of sites that we observed that did drop in PR, 80% of those we were still working with, but 20% we haven't worked with in over a year (no links still found on their site), and likewise, no terms we are or were using showed any real movement.
To date, I'm unable to identify any common thread in the way of changes in the last month between all of these sites, other than our working with them. That isn't to say that most aren't still doing the same things with links that they were/are doing with us.
This is where the usual top-down flow would make sense; if these sites got hit or made some massive change, and that affected all of the sites it was linking out to. That's the norm. But this is almost flowing upstream -- we're not all linking back to these site, but that because we made massive changes at the bottom, we somehow flagged a review that flowed backwards, but only affected sites sporadically, and didn't affect us negatively.
As I said, the timing of the observed drop in PR aligns too well with our massive housecleaning for me to think that it isn't somehow related to our site and our link profile specifically. If I identify some other common thread, I'll definitely pass that along, but for now, I'm looking for any other experiences similar to my own.