I got into the system at 15 Street–Prospect Park around 6 PM. Seeing the huge service gap and cascade of trains piling up at Jay Street–MetroTech, I was pretty sure they would send all those late trains express. I took a one stop north to 7 Avenue for the incoming s. I was not disappointed.
Weirdly, they must have sent a via Culver too, because at the terminal, there was a on Track 5.