I'm not someone who believes in generalizing about either sex. It all depends on the person.
I have two sons (one is adopted) and a daughter, and I knew how I wanted to raise them (which as "as people first, and let their sex take care of itself"). All three kids were (and still are) the same in a lot of ways, especially when it comes to maturity. They have different personalities and different sets of abilities, but they're awfully similar when it comes to "emotional traits".