You're thinking of math, not a ratings/grade system. In the rating and grading world 5 (or 50) and below on a 10 (or 100) point scale is FAILING. You can't compare math's definition of median with a rating median.
Can't anyone read without inference? The number 5 is the mean in the set of 1-10. So using a scale of 1-10 , 5 is the average. That is a fact. I am not assuming anything.
There were games that received less than 5, these games were below average.Maybe it is a statement that games in general are made well that you did not see a lot of below average games.
7.5 is an average or mediocre score, not 5.
Man, I totally agree. I think that there should be a rating website that rates the game with "Rent," "Borrow," "Buy," and "Avoid At All Costs" tags instead of the numbering system. As we can see, some people get confused.
Buy, rent or avoid is my scoring system. Ultimately that's the decision you're making anyway. That's the recommendation you give to your friends.