The service technician came and left, speeds are still unchanged at about 350 Mbps.
He was a Tier1 contractor who didn't seem to be very experienced (I'm being very kind here.) He didn't even have the tool to measure the raw throughput through the coaxial cable. He checked the wifi settings (my issue is with WIRED connection speeds, not Wifi) made a call to the Cox dispatch office and left saying "There appears to be an external problem in the area, I don't know when it will be fixed. Keep calling customer service every few days for an update."
I'm a bit disappointed with the follow up so far. For starters, you should have sent an experienced Tier2 technician who could do some advanced troubleshooting. Sending a novice contractor for the followup visit, after going back and forth on the forum, is just adding insult to injury. Second, this whole "there's an external issue" sounds like BS to me. Is there really such an issue? What area is impacted? When will it be resolved? Give me some details to back up this claim.
If Cox can't support the advertised Gigablast speeds, please be honest about it. Don't waste my time by giving me the runaround. Be upfront - do I need to downgrade to the Ultimate 300 or the Preferred 150 plan, because you can't support 1Gbps wired download speeds?