You can still find 3v3s, 4v4s, and 5v5s p-v-p games on the Diplomacy expansion. Most of the people who are playing regular Sins and Entrenchment are just noobs playing comp stomps with their friends. Overall, the player counts are low but you can still find games on Diplomacy during North American prime time, say from 7 pm - 11 pm U.S. Eastern Time. It's better on the weekends, especially on Sunday.
We lost a lot of players when Diplomacy was released and then we lost more when Starcraft 2 came out, so online multiplayer activity is pretty much on life support right now. Lately the average Diplomacy player count seems to be 25-30 people, but many of those people play p-v-p (though there are still some noobs who play comp stomps).
