I went no carb for about 3 months and it didn't work out for me. Eating small amounts of green veggies has made me leaner than when I was on low carb eating one meal of meat/fat everyday. Going zero carb will help with hunger if that is an issue for you. You simply are not hungry when eating only meat/fat.
Here's an interesting article for those concerned with intense athletic performance. I really like this chap's blog: http://www.paleonu.com/panu-weblog/2...-athletes.html