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JoeSinkwitz - 11:21 pm on Jun 1, 2009 (gmt 0)
Anyhow, it almost always comes down to solid content and acquiring more quality links; just about every modification made over the years can still be distilled down to that simple mantra. Even the faddish social media crap of supposedly golden user data that can be manipulated within 15 minutes...get the content to make your site sticky and get links some people can find the content (or script it out over a worldwide network of proxies). I think a lot of webmasters do get caught up in the daily fluctuations, but the fluidity of search will only increase, so I don't think it inconceivable in the future to see sites go from page 1 to 5 to 10 and back to 1 in the course of a day, all based on what G's relevancy algo says is the best choice for that specific point in time. Finally, it is important to point out that it is now June; expect some interesting tests. :)
It is possible to see the end points of those 300-400 updates more clearly if you grab enough data and build an emulating engine to try and reverse engineer changes...not simple, but doable. To shed light on the aggregate data, importance has increased in the same trend as it has been going the past several months: brand, domain strength, raw link equity, anchor usage...