I think it depends on the day, time, and airline you are flying. We arrived at Washington Dulles on Wednesday morning at 5am for a 6:45am flight. The lines were horrible. The security line wrapped around so far that it blended into the airline ticket lines and made it difficult to figure out which line was for what. Arriving at MCO at 9am was completely different. We flew Delta Express into the B Terminal. We were the only plane in the terminal. No other gates were occupied, no passengers waiting, etc. After taking the monorail to the main terminal, we saw NO line at security,
Coming home last night (Saturday) for a 8:40pm flight, we arrived at 6:30pm. The ticketing line was only about 10 people deep. We got through rather quickly. The line at the B terminal security was minimal and moving quickly. It took less than 5 minutes to move through. We saw NO bags being searched.