Who's "he"? Also you might want to contact the author of the post then, because it talks a lot about how Perplexity searches for things on Google
The nice thing about Perplexity is its source annotation. It will show you in real time how it's arriving at its data capture(s), and then annotate the results accordingly.
It really is a lovely service. It has replaced the "normal" search engine for me, for most of my queries. And has completely replaced ChatGPT/Claude as it can fulfill those needs directly (and even let me choose to use one of those models).
They also have an OpenAI-compatible API. I use it in conjunction with https://github.com/thmsmlr/instructor_ex