Talking about the Ubi over the phone today, my Google Home chimed in. Not only did it do it for me, but also for the person on the other end of the conversation. Their Google Home was responding too.
Why OK in the first place? Well, it’s the consonants and syllables. “Oh” is fairly distinct and “kay” is as well. There aren’t many words that rhyme with OK. O’Jay? Ole? Allay? A Bey (as in Beyonce)? Doris Day? More syllables means less likelihood of a false accept.
Ubi and Google are fairly far apart, so it’s still surprising that it triggers. However, it’s far less annoying to false accept than to false reject, so these devices are biased to accept.
Maybe one day Google will be better at distinguishing. Or maybe they’re secretly triggering off of OK Ubi. My paranoid side would like to believe that.