The folks at RankRanger reports that Google News on mobile is now showing close AMP in the US results up to about 70% of the time.
They said that between January 26th and January 29th is when they saw the spike. On January the 25th they tracked AMP in the Google News results at about 30% of mobile News Box results in the US showing as AMP. Then on January 29th "that number more than doubled," said RankRanger, hitting about 70%. Here is their graph:
Globally it is now at about 50%, but in the US, about 70%. Even more of a reason to go AMP with your news site - ehh?
Forum discussion at Twitter.