There's another part of this: Apple is fairly unique amongst it's (asymmetric) competitors (e.g. Google, MS, Samsung) in that it only focuses on one customer: The Consumer.
In my experience the behaviors and culture of an organization (large or small) that focuses on the Consumer as a customer is diametrically incompatible with the behaviors and culture of an organization that focuses on Business as a customer. (I feel super strongly that this is a key reason Microsoft's products are often good, but not excellent; the consumer ones and the business ones).
EDIT: I decided to write a full blog post as a response: http://ceklog.kindel.com/2013/02/19/why-nobody-can-copy-appl...