Airports having a hub function are dependent on delays which are "imported" from other airports. An airport is to be considered an efficient airport when the departing flights are less delayed than the arriving flights. Compare your arrival punctuality with your departure punctuality and you have a first indicator on how efficient an airport is.
Note that airports without a hub function will perform better than hubs. They can compensate delays easier. But the operational efficiency is a good indicator for discussions where there is a general perception that delays are only "imported".