Google has updated their Android distribution numbers for January, and everything is about where we expect it to be. Ice Cream Sandwich saw a decline, although small, while KitKat increased its market share by about 5% to 39.1%. Most of that growth came at the expense of the much older Ice Cream Sandwich and Gingerbread, as they both saw about a 1% decline each. Froyo is sitting at 0.4%, down from 0.5%, so it's hanging on as hard as it can.
Interestingly, Lollipop hasn't registered on these distribution numbers. Google always notes that they don't display Android versions that account for less than 0.1% of the market, so if that's the reasoning behind not displaying Lollipop, the adoption for Android 5.0 is not good.
Of course, Google could always just not be including the data since the OS is so new. We'll find out in the next few months as major Android OEMs begin updating their older devices and releasing new phones running Lollipop out of the box.
source: Google
