Honestly, I'm not sure. Everyone's bodies are different and their skin bounces back different. I'm 32 and my starting weight was 385 with a BMI of 62. I'm 268 now with a BMI of 43 and a current weight loss of 117 pounds... I have a LOT of loose skin, but that's expected for someone of my size and the fact that I've been over 300 pounds for almost half my life (Literally. I was 303 at 17! -_-"). My guess though is that yes, it'll probably be similar to the post pregnancy loose skin. Though you'll probably have some in different places then before such as some loose skin on your arms (which can be minimized with exercise) or legs (again, exercise) or even where your bra rests under your arm pits (it bugs the crap outta me!). But in the end... I'd take the loose skin over the fat any day of the week!