I don't grow autos I just seen the threads on them but from what I've seen they can vary on when they actually begin to flower. And it seems only logical you wouldn't stop veg nutrients until she was in flowering mode. Variables such as proper light intensity and optimal environmental settings play a large role on how long it takes to flower and whether you will achieve similar results as the breeder. When growing regular seeds we do not stop veg nutrients until the first 2 or 3 weeks into flower cycle, which we set by changing the light hours to 12 hours on and 12 hours off. This is called the transition. When I search this in Google it seems to have a lot of great results, although I didn't read them
Google: autoflower transition when do i start bloom nutrients