If DRS is active just after T4, does that mean the wing will be open through T5 and up the straight to T6?
Or will the DRS only be active for the tiny stretch between T4 and T5?
They'll be flat through 5 even with the wing open I would imagine. Its a nothing corner if you look at the racing line they take rather than the outline of the track. Also being at full throttle they are going to be pumping exhaust into the diffuser so will get all the rear downforce they need from there.