On his Blog he wrote some insightful articles about how and why Trump will win. Unlike the mainstream media, he got it right. So I count at least two accomplishments.
I would say his prediction was more than just coincidence -- which he made when Trump was among 15 candidates vying for the GOP nomination. His raw odds then of being right were 14:1 against.
He also doubled-down - with qualifications - once Trump secured the nomination. Almost everyone else - including myself - saw the general election as a Clinton shoo-in, given Trump's numerous deviations from what most of us had believed were political candidate social norms, among other apparent disadvantages.
I'm interested how much of his articles you've read. Judging from his articles, he doesn't seem shallow minded to me. He is always able to raise clear and reasonable points in his articles.
I wouldn't say he has insight to American but rather human psyche and its biases, which you should know if you've read his articles.
Trump won on account of a strange edge case in the electoral college system precipitated by incredibly low voter turn out (blame the russians, blame the clintons, blame whoever doesn't really matter). Let's not play revisionist history where a situation in which a candidate appears to be polling better and actually gets over 2.5 million more of the popular vote, shouldn't be generally viewed as the front runner.
Regardless, American media makes for an abysmal benchmark.