garyr_h - 1:14 am on Apr 10, 2012 (gmt 0)
@shredtone that would explain why some old angelfire sites are ranking. They look like they haven't been updated since 1998. I'm not even kidding. They even have site counters and use the lime green on black background we all use to love.
They didn't use to rank well, though. But have been the past few weeks.
I haven't noticed anything else long-term. All the sites are being frequently updated.
Nonetheless, I have noticed something else before over the past few months perhaps relevant to what you are stating.
I have had pages which ranked decently for a period of time and then made a change on page. I've seen the page drop 100+ spots in a few hours and take anywhere from a few days to a couple months to get the ranking back. That doesn't happen all the time, but it has happened enough for me to be wary.
I've heard similar stories when people make mass changes. It could be on a page/total page percentage basis or some nonsense to control people trying to data-mine.