Quote Originally Posted by LadySaeko View Post
Full block will block the entire attack dealing you 0 dmg. Partial block cuts the damage you would have taken in 1/2 roughly. On the higher lvl NM or Boss types I get far more partials vs fulls compared to the r50-60 normal enemies because their stats are way higher I assume or like the OP said diminished results vs the higher stuff.

I take Onrush to test shield proc of partials and fulls against TP moves and the dmg I take. I normally dodge the long TP moves.
Also, I'm pretty sure how much damage a partial block cuts is based on the Block value of your shield as well as dLv.