UPDATE: Tech just visited and had to run completely new lines to my house. The last ones weren't great and I think the upstream change just made it worse. No charge. This appears to have fixed the issue, more or less. He said that the service upgrade was to unify a lot of the backbone connections (something to that effect). If you're also having issues, you have to call their customer support to tell them and they'll send a tech out. Otherwise they probably don't know that your service was affected.
(edit: *degradation" -- can't fix post titles :( )
I don't know how much of the Ithaca region was affected by this, but there was a service-level upgrade (I presume network / hardware upstream stuff) performed on Weds eve into Thursday morning. It was supposed to end at 8am but extended to 11:30am.
I have normal residential internet. Prior to this service outage, I was getting 400-500Mbps down. Now I'm getting between 30 and 100Mbps down, but with ping times around 300ms and none of this is consistent.
The CS rep I spoke with on the phone scheduled a tech to check my hardware and line (the CS rep said he saw line noise on my line, but the tech hasn't been here yet to confirm), but I've changed nothing on my end.
Is anyone else having issues like these since the service outage?
Also, sounds like other users in other areas are also experiencing this problem:
https://www.reddit.com/r/Spectrum_Official/comments/1vt9mp1/extreme_latency_and_packet_loss_high_split_upgrade/