I think a lot of the time the stats include pre-op weight loss as well as post-op, so the “100 pounds in under a year” could really be 25 lbs before surgery, and then 75 lbs over the first 10-12 months post-op.
My starting weight was 282.4, but I was 269.5 on surgery day because of my brief, two week pre-op diet. A lot of people have much more extensive pre-op diets and have to lose significant weight ahead of surgery.
I am now 6 months out from surgery and just over 75lbs down overall. Weight loss has slowed significantly so I’m not really sure whether I’ll hit 100 by my anniversary counting from my highest weight, and I definitely don’t think I’m going to get to 169 by then.
Just an added ingredient to think about! I also did RNY, not sure which surgery you’re doing!