Apple App Store #1 According to Angry Bird Developers

"Apple's iOS is still a much better platform for developers, and will remain so for a long time, says Angry Birds development lead Peter Vesterbacka in an interview to Tech N Marketing."

A developer friend of mine asked my opinion of the various mobile marketplaces, and I have to say that I came to the same conclusion Mr. Vesterbacka came to.  Anecdotally I've noticed that people with iOS devices are more likely to purchase apps, while people on Android devices tend to look for free apps.  I suggested that my developer friend write for iOS first, and the other markets as he had time.  What do you think:  Will the iOS marketplace remain the #1 market for developers for the foreseeable future?