As you know, I kind of got Google's John Mueller to admit Google began the mobile first index roll out - although he said, he would bucket it more with the testing phase, but it is live.
Gary Illyes at SMX East last night said a similar thing - that for a "few sites" the mobile first index is live in the Google results. When I asked him how many is few, he said a few as a percentage of our index - which can mean hundreds of thousands for all I know. I did ask him if he can share one example domain that moved over and he would not.
Gary also said that he doesn't see a time when the mobile first index will be fully rolled out. He said there will always be some outliers, some sites that never go mobile first, are only desktop sites and cannot move fully to the mobile first index. For some reason, I suspect in that case, the mobile GoogleBot will just crawl the desktop version - but whatever.
Here are some of the tweets from the session covering this:
I was right, mobile first indexing in Google has started! #ipredictedthefuturefinally #smx #garyspilledthebeans
— Sean Bucher (@spbucher) October 25, 2017
We aren’t going to tell you when we finish rolling out the mobile first index. Will always be some outliers.
— Dan Leibson (@DanLeibson) October 25, 2017
-@methode #SMX