Interesting. Launched a new app recently, and it's been 15%. Guess it varies greatly depending on the demographics for your app, this app is mostly targeting US.
My bad. You made me recheck, and 45% is actually android <4.0, 3.x being neglictible.
My app is overly simple, and answers a very basic need. It is relevant for only one city in France (public transportation related app). I wanted most people to be able to use the app :).
