Diane, been doing great and working hard. How are you? Your walking times are probably good for gownups with one or two persons, but it is a different story when you are dragging kids and older family members around, restroom, stores, kid fits and wheelchairs can be problems, or slower legs. In fact the distance that is walked, which can get to older legs and already tired passengers, may be a big decision maker for a choice between DME and private car service.
As you know the private car service provides a much more convenient way to get to WDW, but it costs money. Many different companies provide service for any size families. There are many families that would rather pay for that convenience, and find it is well worth the extra money, to be able to get someone to help you with your luggage, cut down on the distance from luggage to transportation, speed you off to WDW and to just welcome you to Orlando and WDW in a more personal way than is currently provided by the DME.
The return from WDW to Orlando International Airport is much faster also. A car service can be waiting at the door of the resort as you walk out and take approximately 25 minutes to return you to the airport. Most travelers schedule the car service for pick-up 2 hours before your departure time and to this day I have never heard of any problems being late for the airline departure. If you are cautious you can schedule transportation pick-up 3 hours before departure as the the DME procedure does.
The DME is a good service, but for efficiency and fast service, which is not a service of any bus system, it is hard to beat the car service, taxi or rental transportation that is in place at Orlando International Airport.
As far as the bus service during peak times, we are going to have to agree to disagree. I have been around the DME many many times during the peak hours and I must tell you they do have the lines, they do pile up the people inside the terminal and the busses do have more trouble getting back to MCO because they are picking up a lot more at WDW and tranferring back to the airport. I feel because you travel into Orlando quite a few times each year you may not see the same situations I see and experience 3 or 4 times every week. There is only a certain amount of busses that work the circular route and many times I have seen the loading dock and queing area void of busses during those times. At the resorts I have been around many families who were not very pleased with the waits for DME heading back home.