Pedro is probably right on one account - many people noticed larger than usual swings in SERPs on Aug. 25.
There's still a running post about them at seochat.
I think his < and >> are meant to show that a certain item gained or lost value in the algo, but he's the only one I've seen with such specific data.
Without some hard evidence or an ongoing test project to show this, it's hard to believe...
My hypothesis, however, is that the algo itself is changing constantly, a little bit at a time. I always see SERPs moving up a position, swapping spots, etc. and while the top 10-20 remain very consistent, the rest of the sites are in a state of flux, even from day to day.
|