Quote Originally Posted by Rentahamster View Post
NA players who play on the Korea-only servers for Tera have little issues with lag (relative to what one might expect at first). It operates a lot like a FPS, and being based on the Unreal Engine 3, I assume it is optimized in a lot of ways for responsiveness. The main problem with FF14's lag lies not in the server distance, but rather the unopitmized game itself that relies to heavily on server-side checks.

Whenever the FF14 devs mention "fixing the server issues" it is always in the context of repairing the netcode, optimizing the servers, etc, and not about implementing regional servers.
While true, there is still a noticeable difference in performance from people outside of korea playing versus those in korea playing. It's not horrible to the point of unplayable, you'll just have to deal with and get used to being less accurate and responsive than your korean others.