"USB power chargers are not affected, but some USB accessories that provide power may not charge the device until the device has been unlocked." My ass. At first I thought that Apple had decided that my USB hub was somehow debased, profane or pwned by the Federales, but no -- it does this even when the phone is plugged directly into an iMac with an official Apple cable.
I gather that this is because the Lightning connector is such an over-engineered, Turing-equivalent exploitable piece of shit that to even pull 5v out of it you have to first agree to ISA-level DMA to your RAM or some shit. What kind of stultifying layer violation do you have to have baked into the design to not be able to pull power without going through some kind of protocol dance first? What is that data made of?? HINT, IT'S ELECTRONS. You squirt them into the damned battery.
Update, 2020: Some time in the last few months, Apple seems to have fixed this. I can, once again, charge my Apple phone by plugging it into my Apple computer without unlocking the phone first. It's a goddamned miracle. So, to the people in the comments saying that the previous behavior was right and proper and the only thing possible thanks to the new USB spec... Cool story bro.