Yup. GPS data logs from your cell phone, which can be used against you in a court of law, can be faked. Computers running elections can be easily hacked to fake votes, and the logs won't lie, cause if you own the machine you own the logs. fMRIs that say you're lying can be rigged.
Your car will be mandated to have GPS and internal trackers just like the Tesla, by either Federal law or by insurance company fiat, so, if log faking is possible - and it is - anyone can be framed, and there ain't a damned thing the framee can do about it. Hence my hatred of tracking systems - everyone assumes computers don't lie. They can; one of my jobs as a programmer at my old company was to make us more money by making our computers lie to our customers. If your are inside the box, you are god.
If it has a computer, it can be rigged. Says I.
However. The Tesla S has never shown itself to fail under long distance tests such as this one. This car also was a media loaner, so the previous journalists would have noticed as well. The cars do have the range to do the job - if a disaster doesn't happen. It wasn't that cold - 27 F is not cold in the north, so batteries would not be that affected as the driver claimed. If it were twenty below, I'd look again.
There would be no advantage to faking the logs. Broder would indignantly point out the fraud, and we'd be back to square one; he hasn't yet. I imagine he's racking his brain to see a discrepancy between his report and the logs. If Tesla faked the logs, they are done. It's a lousy binary choice, admitting failure and eating crow, or lying and losing your company. Esp. if you don't have to; the cohort of Tesla models S on the road show no signs of what Broder claims is their range failure, so I'd go with the machine.
Perhaps the GPS tracking was done at the company's site as well as on the car's own tracking system. If the two match, likely the log is real. If it was further tracked by, say, Lojack or similar, we'd have a third data trail and lock it as true. GPS track would give us speed and acceleration. I notice Broder doesn't deny speeding, only saying that speeding is normal and should be expected.
Again - why lie and fake the logs? The result would be a disaster. And would grind the gears of every engineer in the company - engineers HATE fake data. Fake engineering, and the world melts into hell. Better to eat dirt and fix the car.