I gave up and put the Windows 10 PC a Gigabit LAN and moved my Mac Mini onto WiFi. The T4U is now a paperweight. AC P.S. I received a private reply which helped me greatly regarding file transfer...

MikeO'Nexion wrote If you can, just move a file to a remote shared folder - Win10 will display the transfer rate. There's also a utility called LAN Speed Test, though IIRC it may come with some...

The Windows 10 driver just released shows either 325 Mbps or 390 Mbps using the TP-Link utility or connection properties under Windows. USB 2.0 or 3.0 makes no difference. Again same hardware (Linux...

Using the new Windows 10 driver I connect at 325 Mbps on the 5Ghz band. I dual boot with Ubuntu 15.10 which is using a Realtek driver rtl8812AU which connects the 5Ghz band at 867Mhz. Using USB 3.0....