Something else to keep in mind is not to look at market penetration by a particular smartphone. What you really care about what smartphone can I sell the most on. For example, Symbian s60 has the largest market share by a LONG shot, but users spend a TON less on apps. Another example is BlackBerry. Their market share is ahead of iPhone, yet 3rd party app sells is MUCH less than on iPhone. That said, if you are creating a copy of 10 apps on the iPhone that would be unique on a BlackBerry you may be better off on BlackBerry since you will not have to share the revenue with 10 other apps. You really need to look at each app store, see what the competition is, and factor in how much users actually spend on those app stores.
