Ugh, I just posted something else but the computer ate it! Anyways, when you're talking speed of measurements it really depends on what you're doing. If you're doing heavy weight lifting you're going to lose inches quicker than just dieting (and doing cardio will be somewhere in between there). That being said, post workout your body will retain water so your measurements will definitely be larger (I go up 1-2 inches post workout for a day or so).
As for rate of loss... i lose about 1 inch on my stomach for about every 10lbs loss. Beyond that I'm not sure. A lot of times the scale will stall for me and I'll lose inches but then the scale will go down quickly and I don't see any inches loss.