Do not compare your progress to others. We're all on a unique journey. No one else has your combination of hormones/history/age/metabolism/stress/etc.
Also, be prepared for stalls. They happen and it sucks. Take your measurements before surgery and regularly thereafter so that when weight loss stalls, you can still see the progress you're making. (Yes, you can lose inches even when the scale doesn't move!)
Find some buddies who have surgery around the same time as you. It is great having people to talk with who are at the same stage in the process that you are.