Non-Mobile Friendly URLs Show Nearly 50% Ranking Drop!

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  Jim Munro: Is anybody else seeing data that bears this out?
  
  I like that Mark's crew is testing stuff but I would rather have seen a study of a large group of sites' actual traffic rather than a SERP comparison because I'm not seeing the same results with the small amount of data I have access to.
  
  I'm also not sure that using the mobile-friendly tag was the right choice as a site can be adequately mobile-usable and not have the mobile-friendly tag applied.
  
   ;+Mark Traphagen ;is always welcome to join our panel, he has a permanent invitation, and I hope he is able to fit us in to discus this one.
  
   ;
• 
  Mark Traphagen: MOBILEGEDDON: Non-Mobile Friendly URLs Show Nearly 50% Ranking Drop!
  See Our Just-Published Before & After Study
  
  +Eric Enge ;at +Stone Temple Consulting ;pulled ranking data on the top 10 mobile results for 15,235 search queries the week of April 17th (before the so-called #Mobilegeddon  ;Google update rollout), and again the week of May 18th. We pulled ranking information, and also identified whether or not the URLs in the results were designated as Mobile Friendly by Google or not.
  
  Because of the size and methodology of our study, we were able to show the real change that the Mobile Ranking Update brought about that other, smaller and more anecdotal studies missed.
  
  Read the complete study at ;http://stonet.co/MobilegeddonStudy
  
  If you find this information useful, please reshare it! Thanks!
  
  #mobilemarketing  ; #mobilefriendly  ; #mobileseo  ; #seo  ;
• 
  Edwin Jonk: No, I checked a Dutch site which isn't mobile friendly.
• 
  Jim Munro: Nice, Mark, but we`d love to see your answers to our questions. It`s not that I object to the clickbait, you are welcome to headline your posts any way you want but my complaint is that the headline misleads the uninformed observer.