I'm in college now and I haven't taken a single course where 70% wasn't the bare minimum for passing. I even took a comp sci course and it was the very first year that department lowered the passing grade from 80% to 70%. Apparently for the past 30 years of the comp sci department's existance, a B- was barely passing.

I think I know some friends whose majors have 60% as the passing grade, but my major is a science and it's all been 70%.