My 2015 Tesla S 70D does roughly between 260 Wh/m and 370 Wh/m depending on terrain, temperature, precipitation, wind, speed, and driving style. I have no idea what your units mean. A hard acceleration is 250 kW. The average power at a constant 60 mph is about 18 kW.

2 kWh/m seems plausible for level terrain for a larger vehicle that is presumably optimized for low rolling resistance. It sounds a little optimistic but not by more than a factor of two.

So my answer is yes I can believe it or something close.