SnakeChomp

This should be an easy question, but I couldn't find anything specific enough for me in the readme or other threads. The new commute time graph display seems to have changed the Y axis value from minutes to something else. Is the Y axis now in hours or is it an arbitrary unit of measurement? Is there a new range where you know commute times are starting to become a problem, such as when the old graph climbed above 120 minutes?