Expected Delivery date question??

I've ordered studio 1558 on august 21st and initially, EDD was september 3rd. However, the EDD changed after status changed from in production to delivery preparation. Currently the EDD is at August 27th, which is tomorrow. However, the order status did not change yet, and I am confused that if the laptop didn't leave the factory, how will they able to deliver by tomorrow? What is my chance of getting laptop on time?