Update: April 21
I tried my "do ask do tell", which was not rated mobile friendly, and it still came up OK on my iPhone.
But in the Washington Post this morning, p A12, Hayley Tsukayama writes "Google's focus on mobile could banish small firms", online "Google is about to dramatically change how search works on your phone", link here. Small businesses don't have the resources to reprogram sites for smartphones, or may not believe that their own customers interact with them that way.
Here's another story on Mobilegeddon.
Update: April 13
Australian bloging guru "Blogtyrant" offers advice to small business (esp. travel related) on Google's change, which has been in the works for a long time, here.
I'm not sure that his comment on optimizing photos for mobile is always necessary. I think the Instagram square is rather irritating, I'd still rather view photos uncropped.