While you're waiting for your game to arrive be sure to patch up to 1.74 or 2.13 or whatever. The patch took a while during the BTS install so if you want to shave 5-10 min it'll help.

Plus it gives you something to do :)

.

although...then you'll have the headache of also dealing with reinstalling DirectX9.0c rather than having it done automatically when installing BtS