Our simulator checkride standards allowed for a slight (inevitable) descent below DA/DH, so long as the missed approach was initiated exactly at the DA/DH.
For a non-precision, the MDA was supposed to be a "hard" altitude, but when pressed for more guidance, instructors said they had a tolerance of up to 100 feet above the MDA and zero below it when reaching the VDP. If you were in this "window" and he wanted you to land, you would see the runway in time for a normal descent.