Shaddows - 1:40 pm on Aug 22, 2012 (gmt 0)
No, have just been granted a patent that causes a site to bounce around the SERPs, before coming rest at the newly deserved position.
They have been incorporating that technology since at least MayDay, but its been highly visible since penguin (witness the large number of people complaining that whatever they do, their ranking gets worse).
Panda looks for low-quality sites. Penguin looks for SEO techniques.
If you get hit by one, and attempt to fix the problem, you are will not know whether it was successful or not as the mere fact that something changed will cause you to ranked in a semi-random way.
If you do nothing, you will eventually see that change reflected as you settle at your "true" rank.
If you panic, and revert the change or make new ones, Google will identify you as an SEO, and quite possibly a spammer.
Funnily enough, I posted on this topic just before the Patent news broke:
I've stated for years that "fiddling" with things, especially the sensitive areas (eg Title element), is a big no-no.
Test well away from your money pages, and then implement changes in one go.
Some important things to bare in mind:
1) Rolling back changes will not result in previous ranking (you can't uncook an egg).
2) Some changes take a while to bed down - ranking signals "ramp up" over time BY DESIGN.
3) Some areas are INTENDED to do certain things- to convey certain meanings. If you are constantly changing those things, it suggests you do not have a clear idea about those elements. If you don't trust the page, why should the search engines.
Source:If you make repeated SEO changes, do your rankings drop? [webmasterworld.com]
Some spelling corrected