For comparison, Windows uses up about 20 gigs, as does OS X on a Macbook Air with SSD drive. The difference is windows also has a) recovery partition b) hibernate file c) the typical crapware that comes with every windows computer

This has got to be one of Marco's finest trolls so far this year

Actually, including the OS and the pre-installed apps, OSX on a MBA with a SSD takes up just under 10GB.

Also: "The difference is windows also has a) recovery partition b) hibernate file c) the typical crapware that comes with every windows computer"

You just proved why it's a disaster out of the gate. "Typical crapware" especially. The entire comment section is one of the finest trolls so far this year.