And I've found exactly the opposite to be true.
Really. So you're saying you can eat as many calories as you want as long as you watch your carbs?
That doesn't make sense since because generally speaking (barring glandular/medical problems) calorie intake determines weight.
1 pound equals about 3500 calories. Say your metabolism is such that you can eat 2000 calories a day and not gain weight, since you expend enough energy to balance it out. Then say you actually eat 3000 calories per day. You're definitely going to be gaining weight unless you do something to burn off some of those calories, like exercise.