Apple will be the number one platform for a long time from a developer perspective, they have gotten so many things right. And they know what they are doing and they call the shots. Android is growing, but it’s also growing complexity at the same time. Device fragmentation not the issue, but rather the fragmentation of the ecosystem. So many different shops, so many different models. The carriers messing with the experience again. Open but not really open, a very Google centric ecosystem. And paid content just doesn’t work on Android.
I'm a huge fan of Angry Birds and happen to agree with him about Apple. Verterbacka is also brilliant for focusing on retention. How many times have you downloaded an app only to use it for a day or two then never again? Probably a lot. Rovio keeps us coming back for more (a.k.a. retention) by issuing free updates every four weeks or so with lots of new levels.
I also think that new AB plush toys (pictured via Digital Mom Blog) make the best cubicle decor ever. You can get them as in-app purchases in Angry Birds Seasons ($0.99, App Store) and online exclusively through ToyWiz.com.