Back on my IBM 386/75MHz (yes, really), linux could only boot at 25MHz, yet its desktop environment was faster, prettier and more featureful than Windows @75MHz

Edit: I guess it was a 486 in a 386 motherboard. Windows was definitely slower at 75MHz than Linux at 25MHz though:

http://ps-2.kev009.com/sandy55/Interposer/386_upgrade.html#R...