The same thing can be said with a thumbs up thumbs down rating system. That's why it needs to be more elaborate (but still easy to use).
Questions like how accurate the listing is, how clean the cache area is, how does it rate against others hidden in a similar way, how fun was it, etc. Make each question optional and allow PQ filtering on each one.
The more elaborate, the less accurate. I'd still only use 1* or 5* to rate 99% of finds. Either I liked it or I didn't. Don't want to turn peoples caches into some popularity contest when so many depend on how the last finder left the cache. I just like the hunt of any sized cache. However, I TNLN, so maybe that is a factor. I like the exercise and fresh air. I've seen some great caches destroyed by either muggles or other cachers, would hate to have a great cache poorly rated due to others actions.
-edit-
Assuming the data provided on accuracy was accurate.
If you are doubting the accuracy of the accuracy data, how are you assuming the other accuracy data is more accurate?