i have this problem, that the game lags down to unplayble on 3 computers.
2 running w7 ultimate and the laptop running w8 enterprise.
the 2 pcs are at different places and different network providers ADSL resp. cable.
how long it takes until it is slow changes. it can be 5 minutes, it can be 30 or more minutes.
seems to be related to the number of players