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Both tracert and download speed seem back to normal today and match your result of 15ms, so Tinet must have resolved the issue:

tracert to yande.re
<1 ms | 192.168.1.254
<1 ms | ftth.swbr.surewest.net
<1 ms | 172.22.5.13
<1 ms | 172.21.2.13
<1 ms | 172.21.0.250
4 ms | sjo-bb1-link.telia.net [213.248.88.73]
4 ms | xe-1-3-0.sjc10.ip4.tinet.net [173.241.128.109]
15 ms | xe-2-2-0.lax30.ip4.tinet.net [89.149.180.250]
15 ms | as29761.gw.ip4.tinet.net [199.168.63.78]
15 ms | 96.44.180.2.internal.quadranet.com [96.44.180.2]
15 ms | yande.re [72.11.139.2]

[Edit 2/20: And now it's back to 13ms again]

Single Original Images now once again download my connection limit of 50Mbps.

I guess it was just bad timing that you enabled SPDY on the same day as a backbone issue. Though this does seem to exhibit that SPDY has a horrible overhead under poor network conditions.