I have 2 cats. I first applied the test to the smartest one. She got 16 points. That would explain why she takes up a lot of my time. She is pretty clever when it comes to opening doors and getting cat food out of a closed package. She is able to play on her own with her cat toys and interacts with me when I want to join in. Since I have this cat I do not really need an alarm clock. She wakes me up every morning and makes it very clear that she wants a cuddle and food afterwards. If I do not open the door for her, she will find a way to open it herself. At times she almost seems human! She has got quite a large cat vocabulary that goes way beyond 'meow' and she never hisses!
My other cat would score average on the same test. To make sure I took the test again and applied it to my other cat's behaviour. The second cat would score 9. I do not know whether this test has been scientifically proven but it does confirm my cats' behaviour and my personal assessment of their intelligence.