When I ate 1300 calories/day on CW, I could barely maintain a skinny-fat body.
When I cut to 1100 calories/day on CW, I didn't lose much but I was miserable.
This is with a lot of exercise.
When I ate 1300 calories/day Primal, I was stuffed beyond belief and lost one pound.
When I cut to 1100 calories/day Primal to feel less full, I lost 9 pounds very slowly and now I weigh less now than I did before puberty.
This is with almost no exercise and the midst of a depression.
Y'all can debate back and forth, but I know the path for me.
5'0" female, 44 years old. Started Primal October 31, 2011, at a skinny fat 111.5 lbs. Low weight: 99.5 lb on a fast. Gained back to 111 on sugar cheat. Currently fighting off sugar/candy cravings with bulletproof cocoa and a little rice.
I (try to) follow by-the-book primal as advocated by Mark Sisson, except for whey powder and a bit of cream. I advocate a two-month strict adjustment for newbies. But everybody is different and should tweak Primal to their own needs.