Maybe, maybe not. It's all speculative.

Thinking back on the recent M rated games, both strategy and non straegy, most sites usually put up that age thing as soon as they decide.

So far, CA has not stated it's M and until they do, it's not really that official.

In mean time we are all just shooting in the air. M may be spelled different in different countries but Mature rating has very specific requirements to hit it, and on US games anyway when they put a M they have to put why it gets a M, in this case Violence was mentioned, and Sexual Themes were mentioned.

I doubt there is anything that racy, just as I doubt there is anything as gory as what you'd see in the Gladiator movie.

That said, judging by fact no CA dev has poped in on this topic and it's been up a bit, i'd assume CA hasn't decided yet.

Maybe there's a third reason why it's M, maybe they added a drinking mini game like GTA IV. haha