Anyone notice that even thought you can manually ping the WoW server with a nice low ping of 230ms+, but when connected to the game, your latency shoot up to 500ms+?

For me, i can get a nice ping below 250ms but when connect to the game it shoot up to 500ms+.

For me these two ip is the only one that offers decent latency to WoW.
1. 60.49.xxx.xxx - Best IP for me, i get in game latency from 280ms to 550ms.
2. 218.111.xxx.xxx - Good latency, but has very frequent small lag spike. Remind me of watching VCD in a 486sx machine.