Talk:Blocking and Perfect Blocks/@comment-26942762-20150831213125/@comment-23878607-20150831214934

No, the question makes sense. The lower shields simply don't perform perfect blocks well (or in some cases, at all)  because their k/s resistances don't prevent the player's guard from breaking. This is a separate threshold, calculated prior to damage, because the character's guard has to be defeated first.

This does not refer to additional frames available to perfect block, but to the actual success of performing the perfect block itself.