Thanks to the folks who took my post for what it was meant to be, an experienced gas RV and diesel truck & trailer owner with concerns over comparable lack of power to the point I dangerously impead traffic in the slow lanes up a grade without lots of manual intervention and preparation.
I do not expect it to perform like a sports car or compete 0 to 60 with anything but comparable weight and power vehicles which it currently does not (not anything I have owned)
I was contacted by the shop that did the pre-delivery work that they received a replacement VGT from Cummins as part of a recal, so I'm hoping that is the problem and solution.
I will post an update after the repair for those that care.
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