Definitely a "pics or it didn't happen" situation.
Here, I'll give you an alternative explanation: Dorian was an early bitcoin adopter or otherwise had a small number. When reporters started asking his son if he was Satoshi, he realized that that would damage his reclusive lifestyle if people thought he were Satoshi. He thought that telling the truth, that he knew about bitcoin but wasn't Satoshi, wouldn't be believed so he told a lie to preserve his reclusive lifestyle.
But anyway, this eye witness seems a bit odd for other reasons.
Linking Dorian to Bitcoin at any time proves everything, proves Dorian = Satoshi. If Dorian paid for crepe in July 2011 with Bitcoin, Dorian is lying and Dorian = Satoshi. There was a large Bitcoin Conference in New York at that time, giving good reason to be there. The retailer said she recognized Dorian as the customer. He didn't want his picture taken or name recorded. Good odds to me it was him.
And "large volume" = 432,000 coins.
That's not what she said. She said it was him. They had conversation and interactions etc to form good memory.
Memory is highly fallible. Eyewitness accounts are highly unreliable even after a shorter period of time than three years. The burden of proof is properly on the Dorian == Satoshi folks.
by these standards, the Newsweek article itself seems like sufficient evidence.
Early on, there were so few people mining that practically everyone had a "large volume". As such, if you pick any arbitrary bitcoin transaction at that time, it's highly likely it will have originated from a large volume source in the recent past.
I think it's more likely a case of mistaken identity; there are many people in this world, and I think that the chance of someone remembering someone from 3 years ago that they saw for half an hour, tops, with sufficient accuracy for a positive ID is much lower than the chance that there are simply two middle aged asian men who look vaguely similar. It's also improbable that "satoshi" would fly across the country for this purchase. One person's word is certainly not compelling to me.
Even if that account is 100% accurate, it does not link the man who paid with bitcoins to satoshi, but merely to Dorian. The HN link relies on the flawed NewsWeek article to make the further connection from Dorian to Satoshi.