Well, no one can. Though the indications for online sales are pretty terrible. It didn't last in Steam's top 10 for more than a week, and even then it was beaten out by Counter-Strike: Source. Similarly, I never saw it crack Direct2Drive's top 10. Direct2Drive's user ratings are abysmal, and it's impossible to buy it off of Steam without noticing the Metacritic rating of 60 staring you in the face. And of course Amazon user reviews are terrible as well.
It'll be a long while before we know officially, but I'd hazard a guess that it tanked.
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