Q: How do I know if my site is mobile friendly?
A: There are a few ways but the only way to know if your site is already indexed by Google as mobile friendly is to see if your site has the mobile friendly label in the mobile search results. Using the mobile friendly testing tool will show if you pass the test, but Google may still need some time to update their index to pick up on the fact that your web pages are mobile friendly. You can also the mobile usability reports within Google Webmaster Tools, but those can be fairly delayed.
Decline of the Mobile Web - April 2014 - Apr 10, 2014
The case for print journalism - Sep 20, 2016
Circa's mobile app versus the web and RSS - Jul 23, 2014
Digital media and web services unbundling their products - Jun 04, 2014
Interesting design and function plans by the UK's The Times - Jul 30, 2016