You're underselling it by refusing to compare it to the Ford 2.7L ... I drove them both, in fact I test drove everything on the market, coming from an '03 Ram and no favorite going in.
Needed to replace my daily driver and my truck with one vehicle instead of two because the kids are driving now, and I'm tired of playing driveway musical chairs in the winter.
Really wanted to like the Fords, really really ... but both ecoboosts took forever to spool, steering was mush, and the cabin was cramped. Really wanted to like the 5.3L GM, but drove three different trucks with it, and it tripped over itself when I mashed the gas pedal in all three. Loved the feel of the hemi, but the engineer in my head hated it. Loved the feel of the GM 2.7L, and the engineer agreed.
I know the Ford gets better 0-60 times, but i don't care about that. I need 0-30, 30-75, and passing umph. Don't know if anyone charts those, but when I ask my shiny new Sierra for power I get a quick whistle, and then vroom! Never the same snap from the Fords we tested.