I recently had someone do an xrumer blast on my site, and I indexed 4k links in 1 day just to see what would happen. Google did not like this. Probably many of those xrumer links were done on russian porno sites also. Dropped 25 spots so far and still dropping. Gonna wait 2 more days then throw fresh content on the site and hope for the best.
google indexed 4k in one day? how big was the blast? and alot of the time i do "small blasts" my sites drop/dance and then come back so if i was you id just wait it out and if it dont come back in 3 weeks just order a strong link building package from somebody here but proberly was not a wise idea for that person to blast your site to alot of porno sites
What we really need ot look at is how many are wordpress sites or html sites? I think google is looking at link blast no matter if they are pinged or not. have 2 sites 1 wordpress and the other is html. I did a blast on both sites and my html is steady and no bouncing around BUT the wordpress is going through a dance. I think google is looking at this. To many Wordpress themes are moving to fast and i think that is catching google's eyes.
I dont want to jinx myself, but for the sake of information sharing among us all, my rankings have started to bounce back. I am slowly rising back to my original position. Less than a week after dropping 25~ spots, I have gained 10 positions back today.
I am not trying to bust your bubble or get your frustrated, but make sure your not getting personalized results from G, verify your rankings using scroogle.com and see what the results are.
http://www.mikes-marketing-tools.com/ranking-reports/
http://sescout.com/
http://www.seoserp.com/google_page_rank/1000_serp.asp
Just want to update my sites are still ranked #53-57 for all the keywords I was previously ranked #1 for.
It's been exactly 7 days so hopefully it will change soon.