Well, that depends on what the cause of the latency is: extra router hops, congestion, circuitous route, or just the distance. For example, Skype having their own network or not, a Skype call from someone roaming in Tokyo to a local number in Tokyo is going to have about 200ms added to the latency if the packets have to go through the US, even if there was just a single extra router hop and a direct, dedicated fiber, just due to the speed-of-light issue. And real-world situations will be worse than that, even with a dedicated Skype network. BTW, I'm not try to pick a fight or nits - I'm just having a conversation here.