Hah. And again, hah.
See, I was upgrading my Linux install today. This involves running apt-get to get any new versions that are available for the programs I have installed. It then does all the upgrades automatically. However, today I noticed something in the output:
Need to get 365MB of archives.
After unpacking 532kB disk space will be freed.
Notice the 532kB disk space will be freed bit. Yup, that's right. I'm performing an upgrade, and I'm going to end up with extra free space on my drive.
Try doing that with Windows.