Last year, the following schools took IB kids without sibling preference on lottery day (the number of such kids is in parentheses)
Brent (9)
JO Wilson (13)
Ludlow-Taylor (23)
Miner (31)
Payne (20)
Peabody (36)
Tyler (13 in traditional + dual-language)
The only school I saw that didn't take any IB kids with siblings was Maury, and some might have gotten in off the waitlist. When you add in SWS, CHML, Appletrees, other charters, CBOs, and DCPS schools slightly outside of the hill (Wheatley, Browne, Walker-Jones) the situation is far from grim.