Since you've been on the forums for almost two years now, I assume that you have transitioned to fat-burner. At that point it definitely becomes FAT calories in minus FAT calories out.
If you've hit a plateau, you should probably eat MORE carbohydrates.. perhaps up to 80-100, especially if you're active.
5'0" female, 42 years old.
Started Primal October 31, 2011, at a skinny fat 111.5 lbs.
Current weight: 101.5. lbs and holding steady. Spring yardwork here we come!
Co-worker 1: Needs to lose ~50. Now he wants to start Mayo Clinic Diet. Yeesh. Give it up, man.
Co-worker 2: Needed to lose ~55. Lost 20 from stress. Started Primal in Sept, lost 20 more, but gained 10 back on a carb spree. We're working on it.