Also skeptical. Still got a couple more hours until that 12-hour cycle starts again.
FWIW, in my haste to get *something* working in readiness for 6.4, I signed up for a different ISP, Xfinity, and put my PS5 on that service last night (plus a laptop to run traceroute/ping)
On Xfinity, pings/latency stayed around 70ms and no lag or rubberbanding.
I did a couple traceroutes at the same time, one going out of ATT Fiber and one going out Xfinity but same physical location / house.
They both went through some of the nodes we've been seeing, like going through the Chicago, San Jose and Sacramento NTT nodes and included IPs like 128.241.2.18 and 129.250.4.239 but Xfinity never went through 129.250.7.57.
The ATT connection had 20% packet loss and 120ms pings spiking to 200ms but the Xfinity connection was perfectly fine.