Download 3 or 4 hrs earlier
I was thinking on the Digital download should be able to be downloaded earlier like a few hours maybe 3 or 4 hours considering its a really large download or did you want some players to have a head start. Like a few hours like 3 or 4 hours head start. Which is an unfair advantage.
You can preload on PS3/4 starting on September 7th (as advertised in the PSN store - date subject to change). The Xbox 360/One doesn't support digital preloading, you have to buy it on September 9th.
You can preload on September 6th if you are a PS player and preordered the digital edition I believe... Or a little later. I think that was the day. Take that with a grain of salt. As for xbox, because the system doesn't support prebuying or preloading digital content (yet!), you have to wait till it is available for purchase.