The comparison bar that Valvour set was way higher than that. He seems to have particularly unimpressive friends compared to his girlfriend's particularly impressive friends, at least along the axis he sets out to judge.

Overall, the rates of book-reading by women are only moderately higher than those of men: https://testprepinsight.com/resources/us-book-reading-statistics/ and https://news.gallup.com/poll/388541/americans-reading-fewer-books-past.aspx use different methodologies and get quite different results, but that conclusion holds across both.