I would've used their expedited shipping option, but when you read the fine print concerning each shipping method, they warn that the shipping method you choose (and pay for) will only be applied to the first item that ships, if the shipment is broken up. I didn't see an option to force them to ship everything together and wasn't sure if that was just standard. But, I didn't want to risk it.
But, yes, expect it to take at least 2 weeks and if it gets there quicker, you'll be pleasantly surprised. The stuff I buy from their sale is typically stuff I'm not in a hurry for. And I was a little nervous buying Planet Earth from them, given some of the stories concerning loose discs... I don't think I've ever done a return with DDD that I can recall and am not sure how smooth that process is (nothing can beat Amazon, I'd imagine - the way they handle returns is the best).