"What motive would the author have to fake the review?"
No one is saying he faked the whole review just that he omitted a couple heavily mitigating details. Since there were multiple legs where the car was claimed to come up short it will be interesting to see if all of those are refuted by the data or not.
From another article the "long detour" appears to have been getting stuck in traffic in lower Manhattan. Now, I don't know if Elon does much NYC driving, but IMO it's not worth pinning your credibility on a quick trip back to the interstate from the city.
No one is saying he faked the whole review just that he omitted a couple heavily mitigating details. Since there were multiple legs where the car was claimed to come up short it will be interesting to see if all of those are refuted by the data or not.