I could see it mean either way. Some dogs always have that fuzz, some dogs show it when they are being dominant or in a dominant position. If it suddenly pops up with other "symptoms" like whining i'd might be a little worried. Or if it all of a sudden goes away when in a bad spot.
But on the other hand i have seen dogs suddenly rising that fuzz and showing every sign of quitting but still runs over every time. I have learned not to read in on things like this to much, cause as soon as you think you have an understanding of it these dogs prove you wrong.