You just posted the netshare link again instead of a StatCounter one. StatCounter's Mobile OS shows iOS at about 24% last month.
http://gs.statcounter.com/#mobile_os-ww-monthly-201207-20130...But I don't think they count iPads and other tablets as "mobile." Their Mobile Browser chart listed iPhone and iPod touch separately and didn't list iPads at all. Mobile Screen Resolutions doesn't include iPad resolutions. Browser Versions (Partially Combined) has a separate entry just for Safari iPad (which actually exceeds Safari 6.0 and Safari 5.1, combined).