In some sense, I had this feeling when I came to the US for the first time. I was used to study in Universities were the failure % could be easily below 10% for some courses (Calculus, Algebra being an example). In most of the courses the best grades were below a 7 out of 10. And no, there were no A+ to anybody if the grade was not 9+ out of 10.

In the US, though, it is difficult is to fail a course. I really think that failing a course requires big amount of effort.

I think that neither of both systems are really effective. The spanish version can be depressing and the students are not willing to study for the sake of learning but to pass (the average number of years for a engineering undergrad is 7 years back when the engineering was 5 years of study). On the other hand, most students in the US lack passion and are not going to study since most of the time they don't need to study to pass the courses.