OS market share

[jon787]

Does anyone know where I can get info on how much market share different OSes have? I am in a debate with someone.

The arguement (http://forum.howstuffworks.com/showflat.php?Cat=&Board=xbox&Number=49173&page=&view=&sb=&o=&vc=1)

[X_console]

Moving this to General Off Topic.