I’ve seen quite a few reports from different providers in the last couple of weeks and suspect the _real_ average of opt-ins is considerably higher.
I’m hoping to see some numbers from Apple at WWDC, which I expect would be in the 30-50% opt-in. Why? Because some apps (like Facebook) make it seem like it’s mandatory to opt-in. And I believe that if you opt-in for Facebook you’re more inclined to just hit that same button for every app…