Why might a pilot choose to delay takeoff following de-icing?

A pilot may choose to delay takeoff following de-icing primarily to ensure that all surfaces of the aircraft remain clear from ice. After an aircraft has undergone de-icing, it is crucial to maintain the clean state of the wings, tail, and other critical surfaces for optimal aerodynamic performance and safety during takeoff. If there is a delay, it allows time for the aircraft to be closely monitored for any signs of ice accumulation again due to weather conditions or operational factors.

The concern is that any reformation of ice can significantly impact lift and control, making it potentially dangerous to take off before confirming that all necessary surfaces are clear of ice. Thus, focusing on maintaining a clean aircraft is a priority to ensure safe operations.