Google detailed the state of Android OS versions in October and it's has shown that Jelly Bean has passed the 50% adoption rate mark. The three JB releases have all gained ground at the expense of the outdated versions.
2.3 Gingerbread still powers 26.3% of all droids, having fallen more than two percentage points since last month. It's still the second most popular single version after 4.1 Jelly Bean, though.
Android 4.0 Ice Cream Sandwich has lost 0.8 percent points of it share and has fallen below the 20% . Honeycomb (3.2) is still at the 0.1% threshold.
As far as Jelly Bean is concerned - all three releases have improved their shares. 4.1 rose by 0.8 points, 4.2 gained 1.9 points, while 4.3 added another 0.8 points. We expect to see some of the share of the first two Jelly Bean releases transfer to 4.3 in the next few months as more updates come in.
Android 4.4 KitKat was announced at the very last moment of the survey, so it didn't make it to the charts. It probably won't have a significant market share next month either as it will only power Nexus devices by that point.