I'm quite sure this doesn't give you an accurate ping to the servers. I get different IP addresses when i connect to the Bnet servers and use netstat -n to trace the IP addresses(unfortunately I couldn't ping them).
Changing to fibre optics(for SG Users) drastically improves your ping to KR server. Based on my experience, these were my ping before and after changing:
Before:
SEA: 20ms
NA: 300ms
KR: 500ms
After:
SEA: 10ms
NA: 350ms
KR: 130ms
PS: I have a friend who has had the same experience as me
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