In the intro of the article, it stated that the strongest signal of applicant quality found on resumes was the number of typos and grammatical errors. Perhaps

In the intro of the article, it stated that the strongest signal of applicant quality found on resumes was the number of typos and grammatical errors. Perhaps that was an exaggeration or even a joke, but if not, I would agree that this should be a red flag, regardless of a person's qualifications. (I would similarly judge a potential employer on the quality of their job posting. I know when I write a job posting I go to a great deal of effort to make sure it reads well and reflects our company as well as possible.)