Other countries don't have the same notion of what good service is, and don't expect the server to be up your ass about drink refills every 30s to count as good service. They expect you to ask if you need something, so they're not bugging you. It's just a difference in what's considered better. You see the other style at finer (expensive) restaurants in the US, sometimes. It's really nice to be able to chat with your fellow diners without some stranger constantly bugging you while being pretend-nice.