I'm gaming online with my TCL ADSL and suddenly have high latency. Ping to www.google.co.nz is 410-560 ms. Is anyone else having issues? I've rebooted the modem, computer, etc.

Edit: It's all working now (I just waited it out and tethered with XT in the meantime) and I now have the lowest ping I've seen in ages, 164 ms to WoW (USA).