What state of charge are you arriving with? Do any of the dispensers you've used show how much power the truck is requesting? That information is a recent addition to (some) Electrify America screens. Perhaps you're able to see the same information in the frozen north?
Generally, the higher the state of charge, the lower the sustained rate of charge from fast charging. That initial high boost rate is an observation made by several reviewers. It will open high and drop back to a sustainable level. Plus, cold is a mighty foe of charging rate. More about the charging curve::
Generally, the higher the state of charge, the lower the sustained rate of charge from fast charging. That initial high boost rate is an observation made by several reviewers. It will open high and drop back to a sustainable level. Plus, cold is a mighty foe of charging rate. More about the charging curve::