mhansen - 5:46 pm on Oct 3, 2011 (gmt 0)
Talking about the dates of Panda and reports of recoveries...
Why, then, do we seem to have the largest number of recovery reports at the time of each update?
I feel, without any proof of my own, that Google likely tests the Panda changes on one or several different data centers first, which is why we hear a small number of reports of recovery first.
Then after they run the data through its test phase on the limited exposure it gets from that single data center, it spreads the Panda sauce throughout all data centers, much like the other updates Google rolls out.
Much like others have seen, I noticed a large spike in GBot activity in late August (Approx Aug30 - Sept2nd) which led to a ranking change around Sept 16-18th. IMO, this was the roll out to the testing data center. Now, two weeks later, it is rolled out to others.
I would have to look through past update threads to see if the pattern was the same... but I seem to recall seeing something similar.