Call me skeptical. I just googled https/minelab.com and they are not showing any new update. And maybe I'm mistaken but update came on a weekend when most people work Mon.thru Fri. Hmmm? Update video looked pretty authentic. I will check again on Monday.
If you google "minelab equinox update 3.0" the first result is from minelab.com and directs you to the same page as above. I bet we get email notifications by Monday that the update is live. I think someone was poking around minelabs site and happened to find it or the url was leaked before they made it public.