Thanks for the numbers and explanations. Very interesting.

One thing I would like to add:
it is not only that they are marketing genius.
They have created a very solid PRODUCT, which in fact has been brought to the market in an extremely innovative way.

We should not call them "marketing genius". It does not explain their success. And we should understand why they are successful.

By the way, I am using an iPod touch since 5-6 months. And this is the greatest hate-like relation I was into. By far it does not solve my wishes. But I do not see any competitor. Oh, I am hardly using the AppStore ...