I've had the same issues...barely touching 300 Mbps down on Gigablast after two tech visits and I have brand new NETGEAR modem/router, new coax cables, and new CAT7/8 ethernet cables. Did a speedtest right in front of a tech with a plug from his meter to my laptop and back again and both showed dramatically different speeds (their meters aren't like normal "customer" devices).
We also did a Panoamic COX modem swap and the speeds on there were poor.
I think the NODEs/Cox infrastructure is overwhelmed...they just don't want to tell you that.
Did you get any satisfaction? I'm on my 4th site visit, and I finally set aside the Panorama at the suggestion of a smart woman from Cox and bought the NETGEAR C7800. Best Buy sent 2 and tonight when my second tech said its the hardware, I bet him $400 it wasn't. It wasn't. I am soooooo frustrated.
Im on my 3rd visit at this house and 2 at my previous. Its not your hardware.
