Every quarter consumer targeting companies create reports for internal purposes. Nielsen is one company that has been collection user information for decades, mostly for television networks.
Over the last few years the company has been watching consumer electronics sales. In even more recent history Nielsen has been watching and collecting mobile stats.
Nielsen has released statistics for Mobile OS usage and purchase data. Again it clearly shows Android Phones being purchased by half of those looking for a new phone.
None of these statistics surprises us. Android is clearly a better OS and provides a better user experience. Just that fact that Android will run Flash makes it better. Put Flash and all the other features together and Android Phones VS iPhone will put Android on top every time.