Yeah, I dropped 4 pounds back during the winter holidays last year, and the difference was very noticeable.  At 5'9", I went from 140 to 136.  Then later I dropped to 135 when I realized that's what I weighed as a senior in high school, and I just knew I had to.  Everyone noticed the difference, whether I wanted them to or not.  But when you're a planet, you could lose so much more weight and nobody would know unless you told them.  That's some perspective for you, for sure.