Source, 30% down the page: 'In Defense Of 'Difficult' Books', by Claire Fallon, 2014 Apr 17
Even if writers persist in creating convoluted pieces, as many still do, the push to skim and speed-read threatens to nullify their efforts. Some texts can be read and mostly comprehended at 1,000 words per minute, but Middlemarch and Infinite Jest probably can't -- at least by most of us mere mortals. The ability to basically register what each word in Middlemarch means is not the same as the ability to understand the book. Complex works should offer us more and more meaning the more time we spend with them, whether we're rereading or simply slowing down to spend more time contemplating each passage. Rushing through a great book strips the reader of any value other than the right to say we've read the work in question. It's Cliff's Notes without Cliff's Notes.
I know what are Cliff's Notes, but what does this sentence mean? Is this a turn of phrase?