Spotted by Redditor kaldeqca. What's interesting though is that these figures suggest that it wasn't at the expense of Apple's market share, it's more the other Android OEMs that lost ground to Google:
I’ve heard the 7 and 7a have kind of crappy fingerprint detection
I have a 7a and I haven't had any issues with fingerprint unlocking so far. The only times when it required me retrying many times was when my thumbs were wet but that's normal I guess.