Yeah every once in a while try -ping command at the message box and if your ping rates are more then 100ms then the probability is there.

For me UniFi 5Mbps -ping command yields rate average about 50 to 90ms

Sometimes if there is a tournament on the rate will go high, more then 100ms. Then during game very lag and sometimes disconnect error in red lettering will pop up on the top right hand corner of the screen. You just need to wait or reconnect to game but you will not be penalized. My lag record is 900ms WTF !