hmm....well...i live in thailand and my ping to US is around 350-400 while in APEC server it s 100-150.
but your claim of having 160-180 to US server.I find it hard to belive sir.
perhaps your ISP in Hongkong is really advance than my country.or some other reason.
anyway can you post your modem or ISP ? i really want to know what you use.