I live pretty much in the freaking antartida.
My usual ping in most games is 160~190ms (that`s what any USA resident would call lag). And i can play properly most games with northamerican servers, damn, i can even play some koreans hosted open betas and i dont have troubles of conectivity.

But when it comes down to FFXIV... Suddendly all the telegraphs in the world are just not acurate enough. And is not something of "lag". But "delay". The way the servers themselves check your current position is what is causing all these troubles for most of the people which does not have a perfect broadband.

Everyone will still have lag, but things like being out of the telegraph and still be hitted after more than one second later by the attack, those things have to go.