When Apple released its 2013 updates to the AirPort Extreme and Time Capsule Wi-Fi routers in June, the company added support for the latest and fastest wireless standard, 802.11ac. Our first look at the 802.11ac AirPort Extreme showed very promising performance, with speeds nearing 550 megabits per second in some scenarios, a result that was nearly five times faster than the preceding 802.11n standard. But Apple was not the first to the next-gen Wi-Fi game. Although 802.11ac won’t be finalized…