Today I upgraded my XB6 Gateway to the new XB7. Everything went fine no issues until I tested the speeds. My wifi speeds dropped to 100mbps dowload and Upload to 5Mmbps. Where as before it would be 300 to 400 and uploads always around 40s.
I tested it with the ethernet cable on the laptop as well and getting 700 mbps download and 5mbps upload.
I have their 1 Gig plan, so I'm not sure what the issue is. I've restarted the gateway and still have the same results. It also doesn't let me check the Speed to Gateway, it justs keeps looping
On the Xb7 the 2 WiFi bands are combined under one WiFi name, from the speed you posted your device might be connecting to the slower 2.4 g WiFi band, just guessing tho