On previous occasions I have received compensatory miles for minor/annoying issues but for my last issue, I received this:

"Please know we would like to offer consideration in situations such as you described. However, as part of our efforts to streamline our policy for providing compensation to our passengers, we no longer compensate for flight disruptions less than three hours. Also, this includes disruptions to the total duration of the travel. Since we strive to treat all our passengers equally, we must respectfully decline your request for compensation, as the disruption to your travel was less than three hours. I apologize for any disappointment as I am sure that this was not the answer you were expecting."

from Delta....nice.