A lot has changed since 2011. Some was likely Cook continuing execution of things lined up by Jobs. Some could just be tech sector in general, etc.
I love how people say 'execution' like it's an insult. Execution on the scale of Apple is an incredible challenge. Apple sells something like 425 iPhones per minute. It could be argued that execution is the biggest Apple innovation ever.
A lot has changed since 2011. Some was likely Cook continuing execution of things lined up by Jobs. Some could just be tech sector in general, etc.