60kW
I assume you were in L mode with the Regen on Demand (RoD) paddle activated? What was the highest speed you started from to attempt max regen?
If you didn't try it above 75 mph, you might be able to get more than 70kW. SoC shouldn't matter, as long as the battery is warm and there's less than 100% SoC.
My coastdown model says max regen should be a little over 75kW at 75 mph or higher, but I set those results aside. I figured there was an error since I thought they were going to limit regen to 60kW.
If my model is close, regen would be above 70kW until you decelerate below 50 mph.