Considering that the new Lightning to SD Card page says that it's compatible with the iPhone, and on 9.1 my iPhone 6s says that "This accessory is not supported by this iPhone" for the older card, I'm willing to bet that 9.2 will support this new reader, and might even add support for the old reader to iPhones as well!
This would be fantastic news, especially when I'm out shooting an event for work and want to quickly post some shots to social media. I've tried the Eye-Fi Pro SD card and it sucks. The speed and connection reliability are awful and even though I would mainly just leave it inside my camera, it somehow cracked in multiple places. I've never had an SD card crack on me before!
Ok, just tried it. Camera import is working fine on my iPhone! Took them long enough to add something that works without issue on the iPad, but I'm glad to have it. It's much more useful to me on my iPhone as I'm more likely to have it on me and it has a cellular connection so I can easily share images off my dSLR or RX100.