It seems really odd to me. My entire FC and all of my friends on other servers (primarily Balmung) experience no lag. I was even playing from Scotland on a NA server and never had lag issues. The only thing that makes sense to me is that either some people are insisting its SE when it really is either their connection or PC or they are experiencing lag through the server routing process. They could be routing through server hubs that have problems, but generally that points to a problem with people in specific locations and all the problems seem to be random.