Okay, well, the average range for getting from the plane to the resort is 70-90 minutes on DME (
MDE being something else entirely

), so some trips will be shorter, but some trips will be longer. Depends on the time of day, how many guests have to go where, what the smartest routing for the DME bus is...
Disney's transportation system is actually public transportation, albeit in a limited area. Public transportation users who pay $2,500+ a month rent, or a million plus dollars for a unit in large cities don't have a rertasonable expectation of superior service based on their living costs.
Any Disney guest is welcome to utilize the wide variety of transit options, including renting, Über, etc.