It's true. My expanded command <kuid2:45324:555017:10> Instant Load Command can do even more and i use it to start sessions all the time. It can do one of 3 things when executed by the schedule.
1. load the entire train with a random load from the freight queues
2. randomly load cars in the train with a random load
3. can figure out double/single stack intermodal loads when used with a great many intermodal cars.
Generally this chooses a random product and loads it, if the next car is the same type and queue configuration then it it likely to receive the same load as the last car in order to sortof mimic blocking of cars in the train with similar loads.