For me ping spikes occur at about 2 in one hour rate, but originally I thought they were FPS issues.
They occur more often than that for me but I'm NA. Maybe its the server.. maybe its because I'm f2p instead of sub'd. *shrug*
I don't notice ping issues with other games so.. don't think its me. And the ping will jump to 500 or 900 pretty often. Like 5 or 6 times within a 30 minute period. Which is nasty especially when someone decides that's the time to be an outlaw and kill you. Although most of the people that do that are much higher lvl and I have no chance anyway.