I bet it's because they used 87 octane in their latest tests. The Ecoboost loses a ton of hp when using crap fuel. Motortrend is blatantly biased towards GM so it wouldn't surprise me if they rigged the tests.
Car and driver did a turbo vs na test and the ecoboost outran the v6 camaro. a few weeks ago. Motortrend either had a bad car, is lying about what fuel they put in, or is flat out rigging the test since they became a gm advertisement.