This is not a repeat. I repeat this is not a repeat. Oh wait... it should be, "This is not a drill, I repeat this is not a drill."
You're absolutely right, we are doing this topic again due to Google releasing a blog only 2 days after our launch of episode #80 which helped explain things a little better.
As mentioned before...Google has just announced is rolling out a search index which prioritises mobile-friendly websites.
No need to panic but please do take action - if you don't have a mobile friendly website.