It appears Google's latest major version of Android is getting off to a relatively quick start, at least compared to prior versions. With another month in the books, Android 4.1 and 4.2 (Jelly Bean) now collectively account for 6.7 percent of all active Android devices, which are devices that have accessed Google Play within a 14-day period, according to Google's Android Developer channel .
Jelly Bean was released to the Android Open Source Project on July 9, 2012, with Google's own Nexus 7 tablet (built by Asus) getting first dibs. Five months later, Jelly Bean has carved out a nice slice of the market, though it still has a ways to go before it catches up with Ice Cream Sandwich (Android 4.0.x), which accounts for 27.5 percent of all active Android devices.
Still to this day, Gingerbread (Android 2.3.x) is installed on the majority of Android devices, with a 50.8 percent share of the market. Froyo (Android 2.2) accounts for another 10.3 percent, while Eclair (Android 2.1) is on 2.7 percent of Android devices. All in all, nearly two-thirds (64.2 percent) of all Android devices are still running Gingerbread or earlier.
Look for the scales to tip more towards recently builds as newer smartphones continue to penetrate the market. That's especially true now that Android tablets are fairly affordable.