I didn't wonder. I actually think that the sticker on my car ('04
MCS, fully loaded) is a good value, compared to other comparable cars. But then, I also paid sticker (or nearly that) for my last 2 cars, which I also specal ordered. Just how it goes, I guess.
I don't know of anyone paying under sticker, unless they take a car off a dealer's lot that the dealer needs to move.
You got a good deal -- at least as good as anyone else, and better than many (who are paying premiums).
You'll feel MUCH better after you take delivery. So, relax -- and start planning for your first drive!
