I guess there's no way to know for sure right now, but it seems like the Airpods probably do in fact run over Bluetooth since they'll work with existing iPhones

I guess there's no way to know for sure right now, but it seems like the Airpods probably do in fact run over Bluetooth since they'll work with existing iPhones and Macs. Maybe they're using Wifi and building on top of Airdrop, but that seems like excessive power consumption for tiny headphones. I'd bet they're using Bluetooth 4.x + some proprietary magic to get them to pair super easily.