ColourOfSpring - 7:11 pm on Jun 1, 2013 (gmt 0)
Unfortunately, casual observations in volume does not qualify as proof of anything. It merely say "something happened". You can't do SEO that way and expect to gain any sense of value out of your casual trappings. Using your own words, you have nothing BUT shadows of a doubt.
But I will bow out of this decision as well and concede to your superior SEO intellect.
Well, let's just say - I have reasonable doubt in regards to the idea that Google ALWAYS notify us of penalties based on inbound links. I assume you have no reasonable doubts to assume Google never ever ever penalise a site for inbound links UNLESS they notify you? My reasonable doubts are based on lots of accounts and experiences gathered not just from myself, but clients (when I say "clients", I mean website development clients, not SEO clients), and of course other webmasters on various forums not related to myself in anyway.