|Latency is the delay before an action can be performed. You can decrease latency by moving closer to your wireless router/modem. You might just have a slow internet connection though. How does Crysis run on your computer? If it skips even during single player, that could be the source of your high latency.|
Also, try a plain old wired connection. That will guarantee you the best results if your game is running good.
Let me know if you need more help!