Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I seem to remember reading somewhere that actual formatted capacity is in GiB, that is, 1 GB on an iPod is only 1000 MB. Each of those Megabytes is only 1000 KB, and so on. That reduces size, making any change much more significant.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.