If you connect to Nostalrius from France, you'll usually have like 5-20 ms, sometimes around 50, rarely anything more.
You can, however experience a small "delay" that has nothing to do with your connection or your computer, which makes you feel like you have 200-300 ms. This happens when the server is a bit overloaded, usually where there are 6-7k+ people online at the same time.
There isn't anything you can do about it. This problem used to happen after like 4-5k players online, and the donations helped the staff upgrade the server hardware and improve performance.
Hopefully they'll keep geting donations and will be able to do it again