Bioware recently unveiled details regarding one of the bonuses received for preordering, early game access. Anyone who has preordered, no matter the edition of the game, will receive up to 5-days of early access depending on when the code is redeemed. Seeing as it's almost exactly a five month span from the availability of preorders until launch, it makes sense to remove one day for each month passed (ie. redeem July get 5 days, redeem September get 3).
See the official Devtracker post below.
One of the benefits to pre-ordering Star Wars™: The Old Republic™ is that you will gain Early Game Access before launch on December 20th. This is a chance to start your epic Star Wars saga early, as you’ll be able to create and play your character ahead of the official live game launch.
Many of you have been wondering how long Early Game Access will last, and we are now happy to announce that depending on when you redeem your Pre-Order Code, you will gain Early Game Access up to five days before the official game launch date.
Early Game Access is staggered over five days to ensure a quality experience for players at launch. Staggering access aids server stability and a gradual increase in player population through the game.