It seemed to me that he did read the entire post and simply provided his own commentary/experience on the impact of adding such notes to one's file at Google.
Edit: I just noticed the comment you replied to has a more recent edit-time than your comment... Apologies if I missed something here.
Closing words from the link:
"I should apologize to Google here. They got mentioned as an example, but I don't think they're particularly bad. I did interview with them at one point, and made the decision not to continue that process after deciding a different, more certain, path was better for me. So I've displayed interest. And in response to my reply today of "I know where to find you, so please assume I'll do so if I change my mind." they've said they'll make a note on their records."