We didn't go with the Baby Boost in our '17 we went with the big brother!
Ours is a '17 XLT Screw FX4 Max Tow with 3.55 rears and 10 speed transmission.
My wife drives it daily on her 50 mile round trip to work and back and averages 21 mpg in it.
We have gotten a high of 27 once but most of the trips we take it gets 24-25 if we keep it at or near the speed limit.
Well the trip we took to Amarillo into the 85 MPH zones made it drop to right at 20.
The secret to good mpg's on any of the EcoBoost engines is to keep the turbos from spooling but that is true with any force feed engine.