This looks like it's just an ad for their book. No real content on the page.

Maybe they can write a blog entry "gaming the HN voting system to get your ad on the front page". That I would read.

Yes. Also the guy does not seem to be that knowledgeable.

He did not get the memo that more input data can lead to worse results; he claims the opposite in a slight variation (i.e. the more precise the input data, the higher the quality of the result).