This half makes sense to me - 'deception' is an undesirable quality in an llm, so less of it is 'better/more' from their audiences perspective.

However, I can't think of a sensible way to actually translate that to a bar chart where you're comparing it to other things that don't have the same 'less is more' quality (the general fuckery with graphs not starting at 0 aside - how do you even decide '0' when the number goes up as it approaches it), and what they've done seems like total nonsense.