Is there any kind of visible Ping system in the lobby client?
If so where can i find it?
I would like to kick laggers before the game starts

I guess it would have to be the round trip time between the host and the players, rather then the players and the lobby, which I guess could be difficult because you don't connect to the host untill the games starts. (I don't know much about the subject)
Perhaps Ping in this route? LOBBY>PLAYER>LOBBY>HOST>LOBBY=calculate ms
Forgive me if this already exists in some way,shape or form.