internetheaven - 9:47 am on Jan 13, 2009 (gmt 0)

ranking exact mirror sites along with each other is something I'm seeing more of in recent days.

And they're all interlinked too. Seems Google have turned off the interlinking filter ... probably at the request of the huge worldwide corporations that use Adwords and which interlink all their various businesses. I'd love to be able to name a few on these boards, you should see the mess of the footerlinks of some of these billion dollar companies!

one page Adsense doorway pages

Google can deny it all they want. Adding adsense to your pages gets you a tick in a good box.

just dropped 5 places

Here in the UK for commercial terms I'm seeing ranking changes almost daily. The top major terms with millions of searches bounce around less, but the the 10,000-100,000 searches mark has an almost daily rotation.

I don't think "I've dropped x places" posts have much relevance in working out algorithm shifts anymore. Most of those posters then post "I'm back" a fews days later and then "I'm back down" a few days after that ...