One thing to note is that 200 units per day does not indicate mass production. Apple normally ramps production slowly in the lead up to the September release, and a lot may change before Apple begins manufacturing hundreds. of thousands of units. A report from earlier this month suggested that Apple had yet to enter mass production for any of this year's new iPhones, and pointing towards a delayed release. However, Geskin's source seems to believe that everything is on track.
Apple could release the iPhone 8 on time in September by releasing a small number of units at first. Remember that these rumors may be false, much of the information comes from anonymous sources that have not been verified.
Also, this Saturday we are officially starting two posts a week.