So...I literally read macrumors 3 times a day. Daring fireball every night. I own 4 iPads, 2 iPhone 6s, 27" iMac, 15" MacBook Pro, MacBook Air, 3 apple tvs, 2 apple watches, and two airport extremes. And when my wife informed me that her data shot though the roof it took my almost a week to figure out it was the wifi assist. No need to call my wife names, friend. Understand that as long as someone has a decent broadband experience at home, they would have only seen a marginal uptick in their data usage. But for the 3% of that live in the middle of nowhere it gets pretty painful pretty quick.