I would have to agree that it's the not the program but your experience with it that counts. I use (brace yourself) Carrara for the most part, and I have no trouble modeling fairly detailed human forms in a relatively short amount of time. I'm not saying that I'm great at it, or that it would be possible to model a complete human form in an hour with Carrara, but that the fact that I'm fairly experienced with it makes me much faster than someone who got their copy yesterday. I also think that your personal working habits (process, technique, etc) can either add or take away from a particular app's effectiveness for you.