Andre Yoskowitz
9 Mar 2013 8:25
It has taken quite some time, but Android 4.x has finally surpassed Google's ancient Android 2.3 Gingerbread in OS share.
Android 4.0.x is on 28.6 percent of devices, Android 4.1.x is on 14.9 percent of devices, and the more recent Android 4.2 remains relatively unloved (outside of Nexus devices) on 1.6 percent of devices. Altogether the operating systems account for a 45.1 percent share, beating out Gingerbread which remains on 44.1 percent.
Somewhat shockingly, operating systems released before Gingerbread still account for 9.6 percent share, despite their firmware being released as far back as 2009.
As can be implied, fragmentation remains a large problem for Android, as carriers often take extended periods to send updates since they require testing and (usually) carrier-based bloatware to be added.
Check the figures here: Google Devs