If you want to know how much lag you will see, find the IP addresses for some of the servers close to you that you would be playing on. The run a command prompt and type 'ping 1.2.3.4' where 1.2.3.4 is the IP address for the gaming server. You will get responses and the last part will be TTL= then a number. The lower that number the better, usually anything under 100ms will be fine for gaming. If you're lucky you will be sub 40ms.