I actually have gotten comments from the first week by my co-workers. I have lost 10 lbs in my first 2 wks and most of the people I work have noticed and made comments. Mostly that my face is thinner and my pants look looser LOL. Then again I work with a bunch of girls that are always on one diet or another (WW, HCG, ...you name it) so we look for those things. My DH was out of town when I started IP and claimed he noticed the difference right away.
But as several other said before, I'm doing this for ME, not for other people. So having my hubby and the girls at my center cheer me on is good enough for me!
I think other people do have a problem commenting on weight in women, and they will probably tell you later that they thought something was different, but not quite sure what.
Keep up the good work and it will all pay off in the end.