I made a promise to myself to never buy another truck with a V6 again. This ecoboost engine sure isn't going to change my mind. They may get good mileage, but they aren't going to make enough usable power where a truck needs it.
I'd happily roll with the turbo V6 if it gave me 25 MPG instead of 16-17. Overall truck price will probably not be much diffferent than a base V8 truck once it's all said and done. Like I say... time will tell.