Delayed once on a early morning departure out of PLN (Pellston, MI) several years ago on a sub-zero February morning. It was about -10 and windy, they had lake effect snow that drifted on the one side of the aircraft, Saab 340 up to the wing.
However the main reason was that they couldn't get the deice truck started so they to get jumper cables out of one of the agent's cars and jump-start the deice truck.