This DC-based Bump-a-holic sees Y0 a LOT on DCA flights... inbound and outbound... IAH, EWR, CLE, even MEM, DTW, and MSP.

But, -never- have I been bumped from DCA.

That doesn't mean it never happens.
The idea of "business types" not showing up at DCA or going to DCA is the unmistakable DEFINITION of the 'no-show-factor.'
...Especially with all the fickle, federal government folks flying on unrestricted full-fare (albeit negotiated) tickets.

For your sake, though, I'm pulling for you!
Please report back!