I think you will find that you've set a goal that you will breeze by. Also, there is no "typical" bariatric surgery patient. Each and every person is unique with unique circumstances that have brought them to the journey. I highly recommend that you watch this YouTube video. It will show just how much weight is a very individual problem
The surgery changes more than just your stomach size. It causes biochemical changes that work a little differently for each and every person. The key thing is patience and perseverance. Follow the program religiously, track your intake, and exercise. Let things happen as they're happening. 16 pounds after 1 week is a lot when you consider the average weight loss through diet and exercise alone is only 1.5 - 2 pounds a week. So you just about blasted through that average!
I am new to the weight loser's bench myself and the biochemical changes that I spoke of have already started happening. I began being aware of them when I began my first few walks around the hospital. My first walk was around dinner time on the floor so there were all kinds of smells. For the first time in my life, the smells were only pleasant and did not trigger a desire to eat. I was merely content to enjoy the smells and keep moving. I noticed that I had not only lost the feeling of hunger, but for once in my life, felt very neutral about food.