I recently started tracking the books I read on GoodReads and their rating system struck me as the most American one yet:

5 stars: "it was amazing"

4 stars: "really liked it"

3 stars: "liked it"

2 stars: "it was OK"

1 star: "did not like it"

I wonder how many people, without any other context, would interpret "I'd rate this book 2 out of 5 stars" as "yeah, it was OK".