動作報告板より、ひらってきました。
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Tracing route to mentai.2ch.net [216.218.192.139]
over a maximum of 30 hops:
1 70 ms 72 ms 72 ms *.*.*.*
2 71 ms 71 ms 71 ms *.*.*.*
3 71 ms 71 ms 71 ms *.*.*.*
4 71 ms 72 ms 71 ms cba-gw5-pos6-0.gw.odn.ad.jp [210.142.161.49]
5 73 ms 72 ms 71 ms cba-gw2-pos10-0-0.gw.odn.ad.jp [210.142.163.13]
6 71 ms 71 ms 72 ms cba-gw6-pos5-0.gw.odn.ad.jp [210.142.163.38]
7 279 ms 280 ms 279 ms pax-gw2-pos2-0.gw.odn.ad.jp [210.142.163.118]
8 278 ms 279 ms 279 ms paix.he.net [198.32.176.20]
9 280 ms 280 ms 281 ms gige-g0-0.gsr12008.fmt.he.net [216.218.130.6]
10 290 ms 290 ms 289 ms mentai.2ch.net [216.218.192.139]
Trace complete.
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Ping statistics for 216.218.254.90:
Packets: Sent = 20, Received = 4, Lost = 16 (80% loss),
Approximate round trip times in milli-seconds:
Minimum = 688ms, Maximum = 695ms, Average = 138ms

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一応、syncookiesが有効になっていると思われるものの、
鯖のレスポンスは、かなり落ちてます。