It couldn't have anything to do with the fact that Apple's 20 years older than Google, Apple has had really good retention, and the make-up of the Valley has changed dramatically in that 20 years? The implied racial dig is beneath HN.
EDIT: Another thought: Google has also done a huge amount of its growth through acquisitions, whereas Apple has done very few. That likely further pushes Apple's leadership to "old-school" people in the Valley: they haven't brought in large numbers of executives of smaller companies that effectively start at the middle-top in Google.
EDIT: Another thought: Google has also done a huge amount of its growth through acquisitions, whereas Apple has done very few. That likely further pushes Apple's leadership to "old-school" people in the Valley: they haven't brought in large numbers of executives of smaller companies that effectively start at the middle-top in Google.