As I said earlier - RTQ is an actual thing. It's typically used when a wheelchair user cant access a queue (as I said, not as much of an issue at WDW, but a frequent issue at DLR, especially Fantasyland rides). It's never been posted on Disney sites, but it is done. Like DAS, it gives a return time based on the standby line. It's completely separate from the DAS system (one can hold both a DAS and a RTQ time, whereas the system has never allowed you to hold 2 DAS simultaneously). It's typically redeemed at the exit of a ride rather than the entrance.
Whether or how RTQ will be used for other disability needs is clearly a point of confusion at the moment, but it isn't a made up thing that doesn't exist.