This theme is mobile compliant and mobile designed.
Some users find the mobile view unsatisfactory, but it is mobile friendly in that the authors have followed correct standards and specifically designed a responsive view and menus for mobile and tablet.
The google tool for the mobile sites is super weird. I have tested the same site twice in a row and received very different reports. I just do my best to design the site and then view using the Chrome tools to see if it looks good in various device dimensions. 😉