For the people that haven't seen it (and are on Sky), someone started a thread in the Sky forums about this a couple of days ago: http://helpforum.sky.com/t5/Fibre-Br...1581935#M18172

A recent post there says that apparently Plusnet customers were having this same problem about a month ago, but Plusnet managed to fix it. Here's the Plusnet thread: http://community.plus.net/forum/inde...118895.96.html

"The traffic that's routed for Final Fantasy is of a specific type, which some other games also run as, but not all. We're going to see if the changes we do make, make much of a difference, then great. If there aren't any improvements, we'll take this back and look at this further." Apparently whatever they did fixed it for (most of) their customers. Level3 servers are also mentioned at some point in the thread.

Needless to say, there are fixes that can be applied if Square-Enix and Sky/Other affected ISPs actually look into it. At the very least, this is a good example of how companies can actually get involved and respond to their customers, which unfortunately we're not seeing with either Square-Enix or Sky (yet!).