I'm a 31 year old woman, and I absolutely think that women can have success with this way of eating. I found CW dieting miserable and ineffective. Primal in comparison has been pretty effortless. I just cut out grains, added sugars, and bad oils. I eat 2-3 big, fatty, satisfying meals, no snacks, and move alot. I've lost 25 lbs. to get back to the weight I was 10 years ago and I have more energy and better muscle definition than I did then.
I've always been "blessed" with a good metabolism. As a kid I could eat whatever I wanted and stay skinny. When I was pregnant with my son I packed on a lot of weight and stayed heavier after, and found that my weight fluctuated much more easily than it had before. Now I find that as long as I stay with Primal-approved foods (I tolerate dairy well so that includes alot of cream and cheese), I can eat as much as I want again and stay very lean. I love it!