Well, let us know when you find contradictory evidence.
Is that the standard? Someone makes a claim and until we find contradictory evidence, it’s assumed to be true?
fivethirtyeight doesn’t even list Big Data Polling among the 506 polling firms that they rate in their ratings, which they claim are “based on the historical accuracy and methodology of each polling organization’s polls.”
I’m not suggesting fivethirtyeight is the best place to look, but I’d think if people are going to keep making this claim that Baris is so brilliant, they could at least point to a single piece of externally sourced evidence that this is true.