Almost everyone here knows more about this than I do, but yes, cutting back on the carbs forces your body to burn something other than sugar for fuel.
Just a thought, though. If you've been doing this for about a week and don't think you've made any progress, make sure you weigh yourself and/or take measurements. I didn't feel any smaller either, but my BF noticed it, and the scale said I was losing fat. It just might not be perceptable to you, so get the stats.