Well maybe not the wookies, I lost chewbacca's email a while ago.. (bad joke)
but I suppose it could be the service, the last time I did a video Skype call my father was in Newfoundland. It was terrible, kept lagging, the voice connection was fine though... Also tested on WiFi in: Leipsig, Germany to USA. Porentrui, Switzerland to USA. Majorca, Spain to USA. Milan, Italy to USA. and a load of others, my father travels and we have fun (for some reason) seeing how video and audio work from across the world.. ah.. the magic of modern technology..