The report I read was from some time ago, and the situation is different now in that the Laughlin casinos used to let everyone "dry camp" in their RVs in the parking lots--I remember counting over 200 of them in the Colorado Belle parking lot (which is huge) alone. That seems to have stopped.
However, my casual observations indicate that if anything, the people shuffling up and down the street are older than they were back then. It's definitely a major destination for all the retired folks in Arizona, especially those who live right across the river in Bullhead City.