150 lbs in 6 months?

Hi, I am curious as to how many of you starting at around 300lbs, and a BMI of 49 or so have lost 150 lbs in 6 months? Is this possible? The reason I ask is because an online friend and I had surgery the same day, she weighed 280 and I 340. We both have stayed to our exact Dr's orders, (same doctor) and she claims to have lost 150 in the past six months. I haven't seen her, but am shocked!. I've lost 115. I have tried to ask her what exactly she has done to lose so rapidly, having less to lose then I, and she is evasive in her answers. I know this sounds like I'm competing with her, but I just can't get it out of my mind. What do you think? Is this possible??

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