We've got a server in Toronto with Linode that also sees very slow download rates occasionally.
ping dg2.bt.cn
PING (116.213.43.206) 56(84) bytes of data.
64 bytes from 116.213.43.206 (116.213.43.206): icmp_seq=1 ttl=50 time=208 ms
64 bytes from 116.213.43.206 (116.213.43.206): icmp_seq=2 ttl=50 time=208 ms
64 bytes from 116.213.43.206 (116.213.43.206): icmp_seq=3 ttl=50 time=209 ms
64 bytes from 116.213.43.206 (116.213.43.206): icmp_seq=4 ttl=50 time=208 ms
64 bytes from 116.213.43.206 (116.213.43.206): icmp_seq=5 ttl=50 time=208 ms
--- ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4000ms
rtt min/avg/max/mdev = 207.604/207.969/208.744/0.434 ms
traceroute to dg2.bt.cn (116.213.43.206), 30 hops max, 60 byte packets
1 gw-li1215.linode.com (45.79.116.1) 0.252 ms 0.217 ms 0.203 ms
2 10.215.64.12 (10.215.64.12) 0.427 ms 1.464 ms 10.215.64.11 (10.215.64.11) 0.403 ms
3 10.215.32.66 (10.215.32.66) 0.857 ms 10.215.32.70 (10.215.32.70) 0.845 ms 0.832 ms
4 * 10.215.32.49 (10.215.32.49) 0.377 ms *
5 199.245.16.93 (199.245.16.93) 0.480 ms 0.472 ms toro-b3-link.ip.twelve99.net (62.115.169.76) 0.628 ms
6 * ae-1.r00.toroon02.ca.bb.gin.ntt.net (129.250.6.37) 1.161 ms *
7 * ae-2.r22.chcgil09.us.bb.gin.ntt.net (129.250.2.46) 11.488 ms *
8 sjo-b23-link.ip.twelve99.net (62.115.121.176) 58.588 ms 57.354 ms ae-7.r25.sttlwa01.us.bb.gin.ntt.net (129.250.3.42) 53.579 ms
9 sjo-b1-link.ip.twelve99.net (62.115.125.161) 57.304 ms 57.332 ms ae-1.r24.sttlwa01.us.bb.gin.ntt.net (129.250.3.82) 109.054 ms
10 chinatelecom-ic307264-sjo-b21.ip.twelve99-cust.net (80.239.132.158) 60.813 ms 57.604 ms 59.616 ms
11 ae-2.r00.tokyjp08.jp.bb.gin.ntt.net (129.250.6.127) 146.655 ms ae-0.a01.tokyjp09.jp.bb.gin.ntt.net (129.250.7.54) 146.020 ms 146.771 ms
12 59.43.248.18 (59.43.248.18) 221.247 ms 222.330 ms 221.379 ms
13 202.55.12.190 (202.55.12.190) 221.489 ms xe-0-0-12-1.a00.tokyjp04.jp.ce.gin.ntt.net (120.88.54.134) 160.392 ms 161.723 ms
14 * 59.43.249.2 (59.43.249.2) 208.184 ms 59.43.189.197 (59.43.189.197) 199.785 ms
15 59.43.249.10 (59.43.249.10) 214.113 ms 202.55.12.190 (202.55.12.190) 207.596 ms 116.213.43.206 (116.213.43.206) 221.603 ms !X
ping dg1.bt.cn
PING (116.10.184.232) 56(84) bytes of data.
64 bytes from 116.10.184.232: icmp_seq=1 ttl=44 time=245 ms
64 bytes from 116.10.184.232: icmp_seq=2 ttl=44 time=238 ms
64 bytes from 116.10.184.232: icmp_seq=3 ttl=44 time=237 ms
64 bytes from 116.10.184.232: icmp_seq=4 ttl=44 time=245 ms
64 bytes from 116.10.184.232: icmp_seq=5 ttl=44 time=244 ms
--- ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 15062ms
rtt min/avg/max/mdev = 236.936/241.867/245.306/3.454 ms
traceroute to dg1.bt.cn (36.133.1.8), 30 hops max, 60 byte packets
1 gw-li1215.linode.com (45.79.116.1) 0.263 ms 0.334 ms 0.325 ms
2 10.215.64.11 (10.215.64.11) 0.545 ms 10.215.64.12 (10.215.64.12) 0.535 ms 10.215.64.11 (10.215.64.11) 1.620 ms
3 10.215.32.66 (10.215.32.66) 1.109 ms 10.215.32.70 (10.215.32.70) 2.177 ms *
4 10.215.32.55 (10.215.32.55) 0.716 ms 10.215.32.53 (10.215.32.53) 0.646 ms 10.215.32.51 (10.215.32.51) 0.884 ms
5 toro-b3-link.ip.twelve99.net (62.115.169.76) 1.180 ms 2.245 ms 2.235 ms
6 toro-b5-link.ip.twelve99.net (62.115.117.228) 1.043 ms 0.917 ms *
7 sea-b2-link.ip.twelve99.net (62.115.117.48) 66.856 ms 59.475 ms 59.432 ms
8 sea-b2-link.ip.twelve99.net (62.115.117.48) 59.405 ms chinamobile-ic342124-sea-b2.ip.twelve99-cust.net (62.115.171.221) 67.161 ms sea-b2-link.ip.twelve99.net (62.115.117.48) 59.357 ms
9 * chinamobile-ic342124-sea-b2.ip.twelve99-cust.net (62.115.171.221) 69.155 ms 223.120.6.53 (223.120.6.53) 68.355 ms
10 * 223.120.6.53 (223.120.6.53) 69.856 ms 68.452 ms
11 * * *
12 * * *
13 * 221.183.68.138 (221.183.68.138) 218.286 ms *
14 221.176.24.9 (221.176.24.9) 235.743 ms * 221.183.45.113 (221.183.45.113) 249.326 ms
15 111.24.5.222 (111.24.5.222) 228.808 ms * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *
ping 128.1.164.196
PING 128.1.164.196 (128.1.164.196) 56(84) bytes of data.
64 bytes from 128.1.164.196: icmp_seq=1 ttl=51 time=61.5 ms
64 bytes from 128.1.164.196: icmp_seq=2 ttl=51 time=61.5 ms
64 bytes from 128.1.164.196: icmp_seq=3 ttl=51 time=75.7 ms
64 bytes from 128.1.164.196: icmp_seq=4 ttl=51 time=78.4 ms
64 bytes from 128.1.164.196: icmp_seq=5 ttl=51 time=74.0 ms
--- 128.1.164.196 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4006ms
rtt min/avg/max/mdev = 61.478/70.229/78.425/7.263 ms
traceroute to 128.1.164.196 (128.1.164.196), 30 hops max, 60 byte packets
1 gw-li1215.linode.com (45.79.116.1) 0.235 ms 0.161 ms 0.182 ms
2 10.215.64.11 (10.215.64.11) 1.996 ms 1.985 ms 10.215.64.12 (10.215.64.12) 0.427 ms
3 10.215.32.70 (10.215.32.70) 1.662 ms 1.654 ms *
4 10.215.32.55 (10.215.32.55) 0.743 ms 10.215.32.49 (10.215.32.49) 0.404 ms 10.215.32.55 (10.215.32.55) 0.725 ms
5 hu0-5-0-3.ccr32.yyz02.atlas.cogentco.com (38.32.56.121) 1.075 ms 2.248 ms toro-b3-link.ip.twelve99.net (62.115.169.76) 0.800 ms
6 be2994.ccr22.cle04.atlas.cogentco.com (154.54.31.233) 7.423 ms 8.350 ms 8.328 ms
7 128.1.164.196 (128.1.164.196) 100.660 ms be2718.ccr42.ord01.atlas.cogentco.com (154.54.7.129) 13.845 ms 15.011 ms