Hi,
I'd like to report something that looks a bit like a pattern but need more data to be sure this is not just a coincidence.
Anyone noticed a sudden unexplained drop in Google organic traffic around 12th September?
Please see these screenshots.
http://imgur.com/RJDInTc
http://imgur.com/1BAKSEO
Obviously, I can't share much details. I can only say the two sites are unrelated, one is informational, the other one is e-commerce. They're from different countries and serving different niches. Both are affected by the recent Panda.
One of them shows what "slow roll-out" actually means. With the other one, the Panda-slap happened overnight and the "slow roll-out" was not as distinct.
The one that took an instant slap did deserve it as it had copied a lot of content (and the owner was warned on multiple occasions #rant) and with this site it's also obvious where the main losses came from. Comparing search analytics on GWT, you can instantly see that the rankings have dropped mainly on popular and short keyphrases. Longtails haven't changed much.
With the site that was on the "slow roll-out" you can't put your finger on the ranking drop. It's up and down. The impressions have dropped significantly while the reported positions have changed very little.
Links-wise, I was unable to find anything sinister or anything that looks like negative-SEO.
Another peculiar thing is the crawl rate.
The site with slow roll-out received a very high number of Googlebot crawls (bordering on abusive) in early July but no suspicious crawl activity around 12th Sept.
The site with the instant Panda-slap had normal bot activity before the Panda update but an ENORMOUS crawl spike on 9th September.
So, has anyone noticed sudden drops around 12th September? Two profiles is not enough to establish a pattern and I can't find anybody else reporting this.