I am located in California, just got the speed doubling (i'm on blast!), get same results on a SB6141 or zoom 5341j modem -- ASUS rt-ac68u router, connected wired over gigabit (verified full gigabit speeds on my LAN using iperf between multiple boxes)
results are pretty much random, i can run a speed test (idle network) get some shitty ipv4 results, blazing fast ipv6 results -- run same test one minute later and get uniform results ipv4 and ipv6. it's rather infuriating..
I'm wondering if it's normal behavior or perhaps there is some congestion or capacity issues at play, that show themselves more on ipv4 versus ipv6.
what's further retarded is that just doing my normal browsing, certain protocols seem to be capped at 10Mbps, particularly anything VPN or SSH (like SCP copying from my work to my house -- my work is a community college on a gigabit link to CENIC's network, more than enough to saturate my connection, but over the last few months anything i copy from work to home is capped at 10Mbps)
what's also wierd is i can download some big files from big-time websites, stuff from vmware, ubuntu, debian, HTTP type downloads, they max out at like 1 to 2 MB per second on my 100Mbps connection. but if i decide to fire up bit torrent and download, say, ubuntu iso, it comes in like a raped ape -- 14MB/s (verified this earlier today).
so my capacity issues present themselves as being protocol specific. or maybe it's route specific like a congested route (which never presents a high ping response or dropped packets or high latency)
anyways this all leads back to my original question: is it normal to have radically different speeds ipv4 versus ipv6 and could it (in any way) be a cause or symptom of the other capacity/congestion issue's i'm experiencing?
early morning edit: these wierd speed issues are not time-of-day specific (as opposed to seeing the issues only during prime time hours). here's a speed test from 6:15am after a reboot of my modem, on an idle network.