After reading the above comments I'll post this at the risk of being slammed.
I own a 2014 F-150 Supercrew ecoboost 4X4 and tow an Outback 277RL (35 feet hitch to bumper) that weights +/- 9,000 pounds ready for a trip (I don't pay attention to dry weights, they're meaningless and often inaccurate). I use an equal-I-zer hitch with a typical tongue weight of 1100 pounds. Unlike the OP's truck mine has the max tow option giving me a tow rating of 11,100 pounds. I keep my max cargo capacity of 1840 in mind and don't exceed it.
I've driven in storms with gusting crosswinds of 35-45 MPH with no sway or significant push. Semi trucks meeting or passing me give just a slight push, just enough to know that they're there, no more. The ecoboost engine does just fine. on level ground at 55 I'm turning 1500 RPM in 6th gear. A 5 percent grade will drop me to 3rd gear running at 60 MPH.
In short I'm very pleased with the performance of my F-150. Where I tow it does an excellent job. I'll admit in a heartbeat that if I were driving in the true mountains out west I would opt for an F-250 with a diesel.