The Mobile-first Index Update [webmasterworld.com] is confirmed and underway little by little. Members are starting to see shifts in ranking.
So the question is... how the update is affecting Adsense income, or is it still too early to tell?
I started to see a surge in mobile traffic yesterday, October 28 that has continued. Adsence activity was slightly below normal, but very high today.
There will likely be a flux in most metrics until the update has settled, but some sources say that may be well into 2018.