I have flown on two major Asian airlines (sorry to avoid scamming, I will not tell you which) and have always thought that their customer service was a lot better. It would seem they take more value in thier customers than some U.S. airlines. There could be various reasons why, but I think it is probably a different view in cultures and customer hospitality.
On that same note, I will tell you this. Some of the customer services I have gained from some European airlines was terrible. In fact, I think the U.S. may have a leg up on some of these European airlines. Sorry, I know this is a different topic, but thought I give some type of kudos to U.S. airlines.