I think moving from 20 to 22 only affects range by 5-10%.

Nick is probably right, the test seems to be done driving aggressively on slower roads, which would reduce the difference in efficiency between the cars.

Soon enough there will be plenty of real life experiences though. Before committing to an EV, I did some research to see what range people could really get out a long range X. I decided that I could get an absolute minimum of 150 miles in real daily use under any weather condition. And indeed this is proven true. I doubt the other cars would give this level of assurance.