RTS games tend to have more races, (Down of War for exaple has 9), and 4x games usually have more. Would be nice to see some robotic or insect/hive, or a harvester race
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Dawn of War had 4 races. (Space Marines, Eldar, Orks, and Chaos Space Marines) It's first expansion, Winter Assault, added one (Imperial Guard). It's second expansion added two more (Necron and Tau), and its third and final expansion will add two more (Sisters of Battle and Dark Eldar). This is not the norm for RTS games as most RTS do not recieve three expansions.
The average number of races in most recent RTS games tends to be 3. Which is normally hard enough to balance while providing races that play differently.
Game - Number of faction/races(+expansion races)
Command & Conquer 3 - 3
Supreme Commander - 3(+1)
Universe at War - 3
Warcraft 3 - 4
Company of Heroes - 2(+2)
Starcraft II - 3 (unless Bliz is hiding another race on us)
Sorry for rambling... My point, 3 races is an excellent start for a RTS. Although Sins for me is a RT4X, and 3 races work great for a game that sets a new genre of play. Anyway I have to say that I am extremely impress with Stardock and Ironclad Games, and (what little I have gotten to play, stupid work) really looking forward to the furture of this game and its community.
*edit - Hmm, seems I was beaten to the punch twice while typing this reply out. Curse you poor typing skills (and latex gloves).
