IPv6 is having bad packet loss for me in FL.
After about hop 6 it goes down hill.
Most v6 enabled sites won't load, including google, yahoo, youtube etc unless I disable v6. They partially load and hang otherwise.
Pings have 70% loss, trace routers have losses.
Comcast speed test dies about 1/4 way through v6 test.
Here is google.com trace over v6.
2 28 ms 21 ms 22 ms 2001:558:6004:3::1
3 9 ms 8 ms 10 ms te-5-2-ur01.nworange.fl.lakecnty.comcast.net [2001:558:312:b::1]
4 11 ms 11 ms 10 ms te-1-4-ur01.southorange.fl.lakecnty.comcast.net[2001:558:310:5::2]
5 12 ms 12 ms 12 ms te-1-4-ur01.osceolawest.fl.lakecnty.comcast.net[2001:558:310:6::2]
6 19 ms 18 ms 18 ms te-0-9-0-3-ar03.bonitasprngs.fl.naples.comcast.net [2001:558:250:12::1]
7 23 ms * * pos-1-12-0-0-cr01.miami.fl.ibone.comcast.net [2001:558:0:f671::1]
8 20 ms 30 ms 21 ms be-15-pe02.nota.fl.ibone.comcast.net [2001:558:0:f8e4::2]
9 * * 52 ms as15169-4-c.nota.fl.ibone.comcast.net [2001:559::802]
10 * 22 ms 20 ms 2001:4860::1:0:245b
11 21 ms * * 2001:4860:0:1::171
12 * 21 ms * mia05s17-in-x14.1e100.net [2607:f8b0:4008:805::1014]
If I do an external trace in from a data center with v6 enabled I die at same hop. everything after just starts to time out and often it won't even get that hop all the way. Funny the forward and reverse hops both are bad at num 6 but that's unreleated. the trouble maker is just that node.
2 2607:f170:1:7::161 0.505 ms 0.462 ms 0.345 ms 3 2607:f170:1:a::1 0.523 ms 0.375 ms 0.322 ms 4 2001:550:2:19::1d:1 8.753 ms 8.728 ms 8.730 ms 5 2001:550:3::10e 12.356 ms 11.492 ms 12.122 ms 6 pos-1-12-0-0-cr01.miami.fl.ibone.comcast.net * 11.274 ms *