Here's something I've figured out... G2 QoS for "WAN" affects your LAN throughput.
I doubt the way I had to configure it now helps prioritize VoIP WAN traffic...
I've been trying to diagnose a throughput problem to a file server / backup server... and I do NOT have LAN QoS enabled.
Anyhow, I disabled WAN QoS temporarily, and a large file transfer throughput went from a very steady 780 kB/s to 15 MB/s.
So, the problem now is... what happens to the VoIP stuff?
The only way I was able to keep QoS for WAN enabled was to adjust the Up / Down numbers to 1000000 (1Gbps basically), then set SP streams for different classes of traffic. I made a special "1000000" kbps rule between 2 file-share type computers (their MAC or IP address TO and FROM Any).
The other ones are below the Comcast up and down speeds.
Whatever.