See I don't think it has anything to do with familiarity... I am actually speaking to the stance that the 4e rules and guidance support... I will repost what I put in the other thread as an example...
Here are some examples, quoted from the corebooks of what I (and I think innerdude) are speaking of...
PH 1, page 55
A power's flavor text helps you understand what happens when you use a power and how you might describe it when you use it. You can alter this description as you like, to fit your own idea of what your power looks like. Your wizard's magic missile spell, for example, might create phantasmal skulls that howl through the air to strike your opponent, rather than simple bolts of magical energy.
PH 2, page 4 A power's flavor text is only a starting point. You can modify that flavor however you like, as long as you don't change the power's game effects. Maybe you would rather think of the barbarian power macetail's rage as channeling the World Serpent, a primal spirit that appears in some shaman powers. You might say, 'The earth shakes beneath my feet as the World Serpent stirs, knocking my foe to the ground!'
EDIT: So that being said, couldn't I say that valiant strike is actually the ability of my paladin to use the crowd and confusion of combat to misdirect and confuse foes so that they are opening themselves up and he is getting sneaky hits in on them? This in turn doesn't support a valiant character archetype... and in fact could support the sneaky cowardly archetype I suggested before or am I missing something here?