That said, Google changed the way those stats are recorded. It used to be based on all phones that connect to their servers. Now it is based on logins to the Go

That said, Google changed the way those stats are recorded. It used to be based on all phones that connect to their servers. Now it is based on logins to the Google Play store "because they are more active". That's why the line graphs of version share over time are no longer on the dashboard, because it would show a big discontinuity where they changed their methodology. That said, just like on the web it's all about what your users have. My app has roughly 25% Gingerbread and 75% Ice Cream Sandwich or newer. I hope that holds, but there really is no way to stop building for Gingerbread even with the majority on the newer versions.