freejung - 4:10 pm on Jun 9, 2011 (gmt 0)
3) Application to crawl data. This is updated on the fly like regular data.
That makes sense conceptually, but I'm not sure it explains what we're seeing. Under the normal algo (which is static until manually updated, presumably) if you make changes to your site that would impact your ranking, you see changes in ranking quickly (admittedly you don't normally see the full effect immediately, but you generally see some effect).
Now people are reporting no change in ranking even after making radical changes to their sites, changes that should have had some effect even under the old algo. Why? I don't think we've explained that.
Under the theory you propose, if you do nothing to your site your ranking will only change when the algo is re-gen'd. But your ranking would change, under your theory, if you make significant changes to your site that impact the factors Panda is measuring. If that's the case, why do so many people report that their Pandalized rankings are remarkably stable even after making radical changes?
Maybe we're just not changing the right things.