I was going to put this comment in the bigger Google update thread, but this one is newer and really applicable...
A few days before the update I built a new .WordPress parasite using exact match on the subdomain, spun a big article (poorly), pasted in one YT video and three images.
Linked with an exact match for my target KW to a site that I 301'd to my money site, then hit the parasite with about 200 mid-level forum dofollows... and I waited.
Guess what site is now OUTRANKING my money site, which is nearly 6 years old, and was getting 3-4K unique visitors a day!
Yup, my parasite is crushing me on my main keyword. Hilarious or sad? I'm not sure.
to one authority site