jaka,
I've done just what you said and had exactly the same results. Great results. But I think the horror at that technique is that it MIGHT inhibit the wicking that happens later when we have slid on the surface and start to CA the other half of the hinges. In practice, it worked for you and me. There is a chance we might be doing something different that others don't do, or aren't doing something that others do. Or it might be that one brand of hinges reacts badly with your technique and you haven't used them. (I doubt it, all the brands of hinges I've seen look like they would wick ok)

Some of the theory of hinging with CA hinges does sound like it'd be the reason for the statement, In theory, practice and theory are equal. In practice they are not.