Repeated analyses of rider demographics provided to the LTD board by staff definitely paint a picture that supports that assumption, though. This is a primary reason the board has cited for holding fares down, despite the fact that fares historically account for less than 20% of operating revenue.

This information is publicly available, so if you are really interested you can see the data to confirm what you probably already suspect: in general, LTD riders have less financial resources than the general population in LTD's service area.