I also think that a lot of women dress to flatter their figures and/or conceal their weight. I personally wear a lot of loose clothing, cover ups jackets, and black even during the summer. I know I'm not fooling anyone but I'd rather this than wearing something tight and exposing.
For this reason, I figure most people aren't going to notice my weight loss until it's more drastic. But if I had a SO who saw me naked every day, I would expect him to notice. That's for sure.