Prompted by comments on this question.
I added the following comment
the accept rate is colour coded - Green == good, Grey == acceptable, Red == low
but I thought I ought to double check that a) this is accurate and b) complete.
The blog post that introduced the feature just states:
Certain visual styles will be applied to the percentage depending on how high or low it is.
without any indication (that I can see) of what these styles are.
I don't think publicising the exact percentages is necessary just the colour == value.
@Ladybug Killer makes a very good point about colour blind or visually impaired users. While there is a tooltip which gives you the raw numbers (19 of 23 eligible questions) there isn't an indication that this is good, acceptable, poor or bad.