Color me skeptical on a 0-60 of 6.1. But, it doesn't matter. What matters to me is, just for one example, the time my g/f and I were next to each other at a light. Windows down. On our way to meet someplace for dinner. She was driving her Mercedes GLA250. A turbo 4-banger that only makes 208 HP. Just before the light changed, she yelled "last one there has to pay." The light changed and we both hammered it. She did not get a jump on me, as far as the timing on the light. She BLEW MY DOORS OFF. And Mercedes only claims 7.1 sec for that GLA, 0-60.
I said before that the Hemi has a relative lack of performance. Relative means, as compared to the competition. I think the Hemi is the weakest (not just in terms of horsepower) "top tier" half-ton truck motor on the market. Ford and GM both have top tier motors for their trucks that are simply better than the Hemi. More power, more torque, more low-RPM torque, and, it seems, better fuel economy.
The Hemi is not BAD. It's just not up to the competition. Which should be no surprise considering how long it has been since the Hemi had any significant update. The '19 RAM 1500 was "all new" - except for the engine. Too bad, really.