I haven't lost a large enough amount of weight yet for people to really notice, but a couple people have.
For the first 20 lbs of weight loss, I hadn't told anyone I was even trying. For some reason if *I* don't talk about it to people I know, I have more motivation. Weird, but it works for me.
Then one day I'm shopping with my mom and sister for swim suits (it's a group support thing) and my mom corners me and is like, "You're losing weight." I hadn't thought anyone could tell yet, so I'm surprised and stupidly say, "No I haven't." She says that of course I have and wanted to know how much. So I told her. She says I've really slimmed down and it's very evident in my face and that I look great. It was really nice to hear!
Then one day I was warming up some sort of food in a microwave and a friend did a double take when he looked at me and went, "Wow, you're really losing weight!" Awesome!
And then my brother made a passing comment about how I looked like I'd lost quite a bit of weight.
I can't WAIT to get anything like, "Wow, you're so skinny!" or "You'll blow away!" or anything like that. That'd be awesome. So, so awesome.