Your delays are being caused by the white interior you've ordered. If you feel like doing some reading, there are a ton of posts about this in the Model S delivery thread.
If you're willing to change your interior color choice, you'll most likely see your EDD move the correct direction.
See my sig for my Plaid order. I haven't updated that with the latest information... They ended up wanting to deliver (I had a VIN) before the end of the quarter (specifically, 9/28), but the reason I placed my order in the first place was because the configurator page showed estimated delivery in Jan-Feb, and I actually need that timeline as I can't accept a car before then.
So short version: Ordered the sig car on 9/19, and it would have been delivered nine days later.