It definitely has for me
I'm about 20 lbs. lighter now than when I first started, and my calorie burn has gone down in the "Lifestyle" portion accordingly. It started at about 2400 I believe, and now it's something like 2150 or 2200 (I don't remember the exact number off the top of my head - it might even be lower now).
Female, 31 years old, 5'4 1/2" tall
Starting weight 1/4/11 = 215.2 lbs.
Weight 10/11/14 = 175.2 (net: -40.0)
Last mini-goal: 180 lbs. REACHED! Reward - new sports bra
Current min-goal: 175 lbs.
Next large goal: 165 lbs. by 12/25/2014
Lowest weight: 156.7 lbs.
150.2 lbs. <--- Official "Healthy BMI" weight
Estimated final goal: 130-140 lbs.
"You don't have to change your life today. You only need to change your day today."