You make a good semantic point.

10 is top of the scale. It doesn't get higher, so in fact, no-one should be getting a 10 rating, unless they are actually walking perfection and just strolled out of the clouds one day to check out life in the mortal realm for a few years. Hand out 9 point whatevers if you like, but don't devalue the 10. It's like when people use the words 'awesome, epic, legendary, heroic' etc. It doesnt really mean so much anymore if you apply too freely.