User blog comment:Omega natsu2/Episode 182: The Burning Earth, Review./@comment-6152051-20140519224934/@comment-4829046-20140520150213

Unless making yourself known was the point that is, which some MCs like to do. But usually that is not the case. Some cases it's like

A: "Where'd he go?!"

B: "Here! Dragon-"

A: "Oh." *uses spell on A before A could launch the attack*

Apparently action genre requires that enemies have low reaction times which you can give some credit to DB for inspiring. But personally, I only want them to stay quiet in certain battles not all. After all, it IS cool to announce an attack before using it. And here is an awesome bit from Accel World "As incarnation skills are used by solidifying an image in one's head, most Burst Linkers that use it attach a name to specific skills as a trigger to activate the image more quickly"

There you go, one of the logical explanations in a shounen. The reason for the shouting is cause in the heat of battle your thoughts might get a bit iffy so reciting it is a sure-fire way of forming the image. Same principle applies for incantations. They don't HAVE to announce it, just that announcing it makes it easier. Try remembering lines for a poem or passage just by reading it in thought, not too difficult eh? Now try reciting it out loud. Now it's clearer right?

I like that principle cause it would mean that people that never announce it among characters that do, are actually a lot better at forming images in their head and analyzing situations, remaining cool etc.(again, you should really stop typing it as "ect") and I think that makes them mentally superior to the naive characters.