Everything in the article is true, IMO.
As for SEO, I'm not even trying now. It would take me thousands of hours to optimize my existing pages for Google's new algorithm, and I have far less certainty of getting good rankings by doing so than I did 20 months ago, before Google's change. My rankings on Yahoo and Bing are still really good, so I'd hate to sacrifice those.
I'm trying to change my business to something else, so chasing Google right now for my existing site would be a waste.
I hate Google with a passion.