PS version. I don't use autofire. In PS, It takes a second for it to start after you press start button.(about 01.70) At the beginning of the video, the string "GAME START" flashes. The moment the flashing starts is the moment I press start button.

*mod edit - frame counted via somewes.com with updated start timing (modified to +5 frames to make up for the black screen on NES) to 1:13.150