Already sent 200 social signalsI will usually throw some social signals at my site during the dance, then build some medium quality links(web 2, forum posts, etc...), before pointing a few more PBNs towards my site.
I'll also sometimes throw some social signals then do my links.
I never found this source again. But I know Google has an algorithm where they drop your site on purpose after they notice more links coming in, so that you can't measure A/B testing. Then weeks later it comes back up and the links finally take effect..... I can't find the source for this, but I recall it was one of their patents.
I'm pretty sure you were looking for this post http://www.seobythesea.com/2012/08/google-rank-modifying-spammers-patent/ related to the "rank transition" patent.