It really depends... are you exercise? Specifically, are you lifting?
If you're just dieting vs. exercising vs. lifting you're going to see very different results. Dieting alone will probably give you the least inches lost/pound whereas lifting will give you the most inches lost/pound and just flat out cardio is probably somewhere in between.
I do heavy lifting and when I started I actually went through a period where I lost a lot of inches but didn't lose weight for awhile. This actually happened to me a couple of months ago again. Other times I'll drop more weight but not see much of a change in my inches. For some reason they never happen at the same time!
I have noticed, though, that now that I've been lifting for awhile, I've been losing about 1 inch on my waist for about every 10lbs lost. More specifically, I always seem to notice an inch difference when I just got into a new decade (so 189,179lbs,169lbs etc). The rest of my body is all over the place and it's definitely not consistent! I'll lose from my hips for awhile and then my bust, then my arms, legs etc.
Basically, long story short it's all over the place BUT if you want to lose more inches quickly I highly recommend lifting. I know I can fit into smaller sizes now than when I was at this same weight before.