

At least where I work the definition of slow does not cross complexity boundaries. A O(n) algorithm that takes 100 seconds to run is "slow" compared to a O(n) algorithm that takes 50 seconds to run. But if it crosses a complexity boundary and it's now, O(n^2), we state that instead of saying it's "slow", because often it's far more tragical than just taking a little extra time to run.
