For other knife attacks, where one is shown the knife as an intimidation tool before an attack, should be easier to deal with since the "ambush" element is gone. However imho these are not so common.
I disagree. Coming from a female perspective, I would think that knives are used more often
as a means of intimidation than to kill, maim, etc. When the knife is used to intimidate, not being intimidated and having some technique/response to get away is very effective, but at that point it's more about psychology than technique.