As I said, there is a great deal of variance between individuals.
The averages I got come from the data sheets of, for instance, Novolog, which showed in their trials that their T1 users were using , on average, 0.7 u/kg +/- 0.2 u/kg.
Weight will have some influence - a 170lb person will likely uses more than a 100lb person. Since insulin is the "key" that lets glucose into cells, someone with more mass with have more cells and need more insulin.
I do agree with you that the degree of insulin resistance makes a big difference.
UCSF's diabetes center, for instance, uses a formula of 0.55 u/kg as a starting dose estimate to be conservative.
Of course all these need to be tuned to tthe individual, that is why the doctors and CDEs start off small and ramp up.