i see..i shouldn't expect the lag to disappear,but i guess i'd be happy with about 150ms ping..should lag much less then..the server is in the US only,but whoever hosts the game,we download game data from him through the NA server. if we play on the japan server,neither asians nor americans lag on it but the japan server sucks so..Metal Gear Online,PS3..
150ms is pretty much the best case scenario to the US - if the host is in the midwest or east coast, pings of 300ms wouldn't be unusual, and that too on a good day, assuming the host or host's ISP is well connected.
In any case, I'd highly recommend against playing on American servers simply for the reason of proximity, doesn't matter whose connection you're on. I know plenty of gamers who'd kick you from their game for having a ping that high.