DC DPR will refund 90% of what you paid if you request a refund by June 1. I did it last year and it took a while to actually get the money back, but it did come! And it helps DPR take kids off the wait-list. So if you made other plans, please ask for a refund and let other folks get in!
--someone with several top-5 waitlist spots and is eager to have settled plans