As of this morning it appears Google has stopped displaying the AMP label for AMP pages listed in the Google mobile search results. For example, the pages on this site currently are AMP enabled, but when you find articles in Google’s mobile search results from this site, the gray AMP label no longer shows up.
AMP label gone. Here is a screenshot of the Google mobile search results without the AMP icon:
Not replaced yet. Google was thinking of showing a page . . .