People here didn't say "oh experts said X, I am updating," they said "EY said X on facebook, time for me to change my opinion."
My reaction was more "oh, EY made a good argument about why this is a big deal, so I'll take that argument into account".
Presumably a lot of others felt the same way; attributing the change in opinion to just a deference for tribal authority seems uncharitable.
Say I am worried about this tribal thing happening a lot -- what would put my mind more at ease?
DeepMind's go AI, called AlphaGo, has beaten the European champion with a score of 5-0. A match against top ranked human, Lee Se-dol, is scheduled for March.