Just checked out your game's home page, it looks awesome! (pun intended)
Is it pure UDP or do parts of your game such as lobby use TCP? If it is pure UDP it might help me with a side networking project I'm developing.
In general, I tend to agree with hplus, where you as much as possible should assume the internet is unreliable. Doing so usually means a slightly worse game experience for the players who have great connectivity but a far more playable experience for the substantial chunk of players who have packet loss > 0.25% etc.