I did a frame-by-frame of KevinDDR's Shirase 1300 video, and I discovered that the delay between a piece locking down and the next piece entering is 2 frames longer than listed on the wiki. When ARE is 4 frames, there will be 6 frames between locking down and the next entry. When line clear + line ARE is 6 frames, there will be 8 frames in between. (When ARE is 25 frames, there will actually be 27 frames between the piece locking and the next piece appearing.) Does anyone know the reason for this? There's nothing about it on the wiki.