After tons of online research, then going to the actual dealers themselves afterwards, rebates are most likely how they came into that price point *for the most part*. Rebates will also depend on how you decide to pay for your car.
For instance, that 27k isn't necessarily a scam price, but there is fine print. My guess is you have to take Ford credit at a high interest rate (even if you have a great credit score).
Other options include 0% financing through dealer (probably the worst amount in rebates), paying cash/credit union/bank financing.
After you go to a dealer or a couple of dealers, you must calculate if it's worth getting the extra $1000 or $1500 in rebates (just an example) over a higher interest rate.
But all in all, it depends on how much you're putting down and can afford each month. Like I said, if you're paying for the car straight out cash, OR through another financial institution, you will probably not get it for the price listed on the website. I'm almost positive that price includes all possible rebates thrown in at once.
BUT only way to find out for sure is to visit the dealer/talk to online sales