Low content tend to stay in the abstract, and leave out the details. High content give detailed descriptions and let the abstractions to be deduced by the listener.
This often leaves low content speakers wondering how things are being communicated, while they've had the issue described in great detail earlier, but incorrectly discarded the information as meaningless small talk.
High content speakers, on the other hand may struggle to decipher something that isn't really meant to communicate anything, or they may feel being kept in the dark and made guess then punished for guessing incorrectly.