grease does not equal anti-sieze, but I think it's important to note that grease is a hell of a lot better than nothing for this application. the point here is that there is some layer of something between the two metal surfaces so they do not start bonding to each other and seize up the bolt or whatever. anti-sieze is obviously the correct thing to use here because it was designed for that, but a hell of a lot of people use grease and have for a long time. if you are concerned enough about precision to be using a torque wrench it may make a difference, but i'm willing to bet the majority of the people here working on bikes don't even own one.