Sadly, there are no real timeframes.
Your dealer doesn't know.
Ford Marketing doesn't know.
Other customers don't know.
Not even other Limited customers know.
The timeframes have been all over the place and there seems to be virtually no correlation to trim, engine, body style, color or just about any other factor we try to use to help predict timing, except the occasional short commodity, which is specific, temporary, and still somewhat of an unreliable predictor (just ask all the folks who have removed options from their orders only to still be passed over for scheduling).
You'll drive yourself crazy trying to nail down any kind of reliable estimate on delivery timing for your order (I certainly have). Unfortunately, that's just the reality of things. It'd be just as reliable for you to ask an astrologer.
-SR-