@Liberty22 While guests (and some hosts) may not leave reviews because they don't like the review thing or just can't bothered, some people, which might not be the case with this guest at all, simply have poor writing skills and may shy away from writing any more than absolutely necessary.
It's a shocking statistic for a first world country, but 21% of the adult US population is classified as fully or functionally illiterate. It doesn't mean they're stupid, but just never learned to read and write properly, either because of poor schooling, or some learning disability like dyslexia.
I used to scratch my head over why Mexican tradespeople would seldom answer a text message, but pick up the phone if I called. Then one day it struck me- they are probably illiterate.