Oh my goodness, what a difference!! You can especially see it in your face and you have a super waist now too!!
I have the same problem, I've lost over 3 stone now and only 2 people have noticed (well, commented any road!) and it IS disheartening, especially when you're so proud of what you've achieved and you want others to share that achievement and be pleased for you!
All I can say is a good friend of mine said the same as others here, people don't like commenting as they feel they're saying you were big before - but, the way I look at it, I KNOW I was big before!! I hope people say something to you soon, I'd have been disappointed too that no one said anything but I honestly bet they thought it, you look beautiful in those pics!