If the power/torque numbers produced match what is stated in the article (320hp, 370 ft lbs), then I seen no reason why the 2.7 would not be more than adequate for half ton duty. With the turbo, torque will be available at low rpm.
My concern would be longevity. The 3.5 ecoboost hasn't been around long enough to know if longevity is a concern, however I haven't read anything about premature engine/turbo failures, which is a good sign. For those of us that use a truck for towing/hauling regularly, my heart would still lean towards a V-8. However, the smaller 6's that are gaining popularity are more than adequate for most people, probably for myself also.
I will say this. I love the power in my truck (380hp, 400 ft lb). Its nice to be able to maintain highway speeds pulling a steep grade with 6000lbs in tow. Its not necessary, but the cro-magnon in me likes it
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