Ug, I've lost 16-17 pounds and yet my pants don't fit much better at all. Well, I broke out a measuring tape about a month ago, and I discovered something. The part of my stomach where my pants lie hasn't changed in measurement in that month, yet the "over-hang pudge" has shrunk. (And actually measures smaller. Not sure about that one...) I'm hoping once that area has shrunk some more, the actual waist will start to go with it. Plus, I added crunches/sit-ups to my routines.
So, overall, I was happy to hear that a lot of people in my weight didn't drop a pant size until 25-30 pounds down. Cause that's what it's going to be for me...