Does FDOT encourage speeding?

I was out of town when these signs went online. So recently, when I was driving southbound and noticed the advisory sign was live, the information jumped right out at me. Something wasn't quite right. Notice the speed limit sign, and then look at the distance and the estimated time. At 55 mph it would take a driver about 5 min 27 seconds to travel 5 miles. To reach the I-4 exit indicated on the sign in 4 minutes a driver would need to travel 75 mph. It would seem that their numbers rely on drivers breaking the law.