Yes, as with all rts games pretty much. The games are run in synced simulation mode, and so must stay with 200ms of one another. If you are having lag issues and need to increase the latency period, you can use the network+- to do so. That is ctrl+-, I think. Or, if the slower machine is unable to keep up because of graphics, those can be turned down in settings, or the fram skip option can be used ([ and ]) on the underperforming client.
If it is the simulation is bogging down the CPU, then there is not a whole lot that can be done -- turning down graphics on the underperformed can still help, but it depends on how bad the CPU is lagging behind.
Hope that helps!