Edimax AC1200 supports 802.11ac but only connects via 802.11n; why?

Question

My laptop can connect to my home network using 802.11ac just fine.

However, according to Windows, my Edimax AC1200, only connects to the network via 802.11n.

This is despite the fact that the product claims support for 802.11ac:

USB 2.0 Type A Wi-Fi dual band adapter supports 802.11n & 802.11ac maximum wireless speed up to 300Mbps on 2.4GHz band or up to 866Mbps on 5GHz band

This happens even if I restrict the Wireless Mode to 802.11ac in Device Manager.

I don't understand what the reason is. Why would this happen?

Answer 1

Edimax support said that the 802.11n is a "typo" (which you can verify by checking the reported rate is over 300 Mbps) and that the 867 Mbps is the link speed to the router, not to the CPU.