Since I started avoiding bread, potato (not sweet potato), rice, pasta and sugar, I've lost a lot of weight.
I did even less -- I cut the added sugar (specifically fructose) to the AHA recommended limits, but I allowed myself to eat all the other carbs I liked, and as much raw fresh fruit as I liked. Weight fell off me and has stayed off for 6 months now. My waistline dropped by 4". So far it seems I can basically eat as much as I like, including carbs, whenever I'm hungry, and stay at a healthy weight, so long as I keep my sugar intake low. So personally, I'm pretty much convinced that Dr Robert Lustig is right about fructose.
Of course, YMMV, I'm not a doctor, etc etc.