Ifrit Extreme....What's Different?

[Deatheye]

If a JP player has a 50ms latency and a foreigner has 300ms (I get ~130 on the west coast of the US, but I'll give others the benefit of the doubt), that's only a quarter of a second difference, right?

I just pinged one of the Gameservers from Switzerland, Europe. I get betwenn 290ms and 320ms. It's in the middle of the day not much going on so I will test that again in the evening I'm assuming it will be worser.
For a FPS this would make playing it useless. No Idea about FFXIV thought. Never tried out Ifrit. But seeing things like dead bodys floating around or people falling dead to ground far away from any Mobs or attacks there must be something else going on. Or it's just depending on the time. Which I'm looking Forward to the ping tests in the evening.