The "medic update" in August hit one of my health sites slightly, but improved my casino ones. The recent update hit my casino sites but DAMN my health sites sky-rocketed haha.
Generally all the updates you see nowadays are centered around improving quality of your content and user behaviour. Check your analytics like the dude said above and see if certain pages with high bounce/low session time are hit worse. Also follow up whether its landing page with plenty of CTA's vs. informative pages.