That's a line issue.
Running the test with only the Modem (TC-7610)and PC, I am getting full speeds. Once I hooked up the Netduma again. Speeds tanked. Everything is set up as it should. I wouldn't say it's a line issue.
After setting up the CM600, my speeds improved. I am consistently getting over 100 meg down and 8 meg up on both wired and wireless connections. So far everything is testing good on it. Not much of a difference vs the TC-7610 line quality wise. Ping Plotter, Line Quality, Bufferbloat, and the Puma 6 tests are about the same. The Channels it has locked on to are in the low 800hz-900hz vs 900hz+ with the TC-7610. The main difference is my speeds are faster. Have not tried gaming on it.
I'll try to upload some pics, but having issues uploading them from my phone.