Thanks for the more detailed information. I double-checked and it seems you're right for the states I could find data for - industrial users have some extra per-month fees to cover the baseload made available to them (billed per kW rather than per kWh) but these don't offset the far lower rates per kWh that I found.

There is often a difference between "industrial" vs. "commercial" but both seem to pay lower rates than residential.