I have enjoyed his writing so far and haven't found reason to question his fact checking yet. Can you offer any example for someone curious about the sketchiness you mentioned?
https://twitter.com/elonmusk/status/895834554245709824?lang=...
and I recall some of his figures about initial tesla production being outrageous. Like body gaps of 40mm being deemed the target. Figures like that made me wonder if anyone had proof-read it because a 4cm gap in a car is enough to fit your hand through
e: in hindsight your comment about 40mm gaps, as an example, does some particularly crazy and I'm surprised it didn't stand out to me.