There is a tremendous amount of chatter going on about Google updating over the past couple days or so at WebmasterWorld.
On February 6th we had the Page Layout algorithm update but that didn't cause much of a fuss in the SEO forums. But something over the past couple days is.
Moderator, Travelin Cat, said:
I'm following about 25 client sites and all but 3 had a huge jump in traffic on the 11th. Some doubled their traffic. Hoping this is a trend going forward.
Also, these are all in the U.S., on the West Coast.
There are a lot of people who agree and are noticing changes between the 11th and today.
Mozcast shows heavy activity earlier on but not on the 11th. However, it has not updated today yet, so who knows. SERPs.com also shows a steady high volatility pattern. SERP Metrics is off the charts on February 12th and Algoroo also shows a lot of high activity.
Plus, we have a lot of chatter at WebmasterWorld and the other Google forums.
Have you noticed a change in rankings at Google on February 11th through 13th? Some are suspecting it might be the monthly Panda refresh.
Forum discussion at WebmasterWorld.