Android is, far and away, the most costly in time and resources for us to support because of poor maintenance of the OS and number of version in large scale use. When corners have to be cut Android is always the first to go.
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You say "US" are you a LW developer then? I always heard that objective-C was one of the worst languages to develop with, and the devs I have dealt with love working within the android framework, I guess different strokes for different folks. (I know a lot of devs that curse the apple infrastructure, especially around connections with blue tooth and usb)