We are from Philly and we have used AirTran more times than we have used US Air. We have traveled to Disney about 15 times and about 5 times to Ft. Lauderdale.
Everytime we have used Airtran we have received great service and believe it or not, we have arrived early going down (due to tail winds) and on time returning. The Pilot talks to you several times on the trip letting you know what is going on. Things like, what you can see out the window, where we are, what the time and temp and weather conditions currently are in Orlando, approx arrival time, if we are going to expect turbulence and if he will be going higher or lower in the aircraft, just little tidbits.
I would think delays are typical depending on weather conditions on the entire East coast.