The problem with Apple's site is that they have to create human scale because of the inward focus of the campus and it's isolation from dense urban fabric. The designers took the Pentagon as precedent, but missed the fundamental role that being connected to an urban center provides in mitigating the negative effects of a form designed to contain secrets.
One can see Amazon flexibly leasing space on their campus to other companies, it is hard to see that with Apple's design.
Apple's building is a duck. Amazon's a decorated shed.
Ducks and sheds: http://en.wikipedia.org/wiki/Big_Duck#Legacy
http://www.amst.umd.edu/Research/cultland/annotations/Ventur...
Of course, skyscrapers can also be bad, as it limits mixing. People only tend to interact with people on the same floor.