You should be able to, like Leadian said before there's the 2 gig step, then the 12 gig step, then apparently an 4 gig step... hopefully after that, just minor updates then game start.
I've been waiting since before launch, I had a beta key that I (mistakenly) gave away. But a few days ago I found a really good deal on the deluxe version of the game so I decided to just go with it.