The User Experience Success of Angry Birds?

I just came across this fantastic analysis by Charles L. Mauro on the success of Angry Birds. While many will claim that it is pure marketing and hype, Charles argues that 1.2 billion hours a year people spend playing the game means that it is actually the user experience and design of the game that accounts for its success. 

It's definitely one of the smarter and more thought-provoking pieces I've read in a while. Check it out on his Mauro on Media blog.