Got some issues as well, bought the game on the 19th and started playing on the 20th, there were no issues the day I first started playing. Since yesterday it’s getting progressively worse for some reason, it’s barely playable today. Guild Wars 2 seems to be the only game where I get network issues, I’ve had no problems whatsoever in other games.
Location: Poland.
Server: Seafarer’s Rest(Where lag occurred)
I’ve changed my home server a few minutes ago now to see if it the problem would be fixed, and indeed, it runs smooth as silk again. We’ll see how long it lasts.