Read my other response. It's about having 100% be the normal. There is a difference between having 99.99% all of the time, and having 100% all of the time and 99% in rare occasions.
So "100% most of the time" actually makes sense, and is probably as good as you might hope to get on a huge test suite.
So "100% most of the time" actually makes sense, and is probably as good as you might hope to get on a huge test suite.