Maybe it's just me, but no matter what I did before surgery, wore my hair differently, bought a new dress, wore make up, etc. my coworkers would say "wow you look like you've lost weight, you're looking good". So I'd just respond by giving them a smile.
After the surgery people have told me crazy stuff, like "before surgery you looked swollen, now you don't" or "you can really just tell in your face".
But to be honest I could care less about what anyone says. I feel like I lived my life long enough basing how I felt on others comments. Now they can all kiss my shrinking butt!! Life is really too short to think too much on what other people say.