I've been on the exact opposite side of this argument for the past year, both here on the internet and IRL. Sure, we can't look inside Apple's systems, but if they say they're doing X Y and Z, we ought to believe them. Apple knows that if something comes to light after they've billed themselves as a privacy company, it will be a big scandal, so they'll want to keep their word.
Well, here we are, and now I feel stupid. Fool me once...
However, Google can still adopt Apple's position that data collection should be turned off by default and only turned on by the users after you explain what will be done with the data.
They won't since spying on users is how they make the vast majority of their money, but they could.