It is true for some companies. That said, in my experience, the more it was visible in an interview that the interviewer read my application, my website, my open-source code etc, the more enjoyable working for that company has been for me. I guess it’s a sign people at such a company give a shit. It transfers to other areas than just interviews led by them. At this point, if I see that the interviewer barely skimmed my CV, my expectations, that this job will be good, plummet.