Seeing slow speeds tests when QoS is used: 100/3 ISP
With something in QoS

Nothing in QOS

I saw this on v1.00 as well.
Tested with dslreports.com as well.
Also seen on Mac Mini OX 10.10.5 wireless.
Tested all 3 different QoS sections.
Wired PC is a Windows 7x64 Nvidia Gb NIC.
Saw bad IP address acquire behavior after removing the PC from QOS and rebooting. NiC failed to gain an IP address on it's own. I have to use Windows diagnostics to reset and get the NIC working again.
DIR-890L results: v1.09
Something in QoS:

Windows 7x64 wired speed test pc in High section
No QoS used: