You will also see that the books that received a 5 rating before (top rating), now appear with a 8 rating. This is because I feel that the 9 and 10 rating should be reserved for something quite exceptional. That said, a 8 rating (which is usually the highest rating) rates the book as an excellent read with a strong recommendation.
The breakdown of the rating scale is as follows:
10- exceptional - a must read
9 - remarkable - should not be missed
8 - excellent - strongly recommended
7 - a good read with specifc flaws
6 - fair but with many flaws
5 and below - not a good read, not recommended