Does anyone happen to have that drawing? I'm not fully understanding your explanation, Sangoku. I'm more of a visual learner, so the drawing will probably help a lot.
From what I'm understanding, when you parry while crouched, instead of it only lasting from 1003-1000 like it would while standing, it would last from 500-1000? (Yes I understand that the numbers are arbitrary.) I'm probably wrong with how I'm understanding it, though.
Edit again: Okay so if for example, a falcon nair was falling on you, instead of having to parry anywhere from 1003-1000, you crouched and parried at 500 but you parry/shield so yoshi's head goes back up to 1000. Therefore, you have a little bit more time to react because the nair hasn't hit you yet if it's at 600 for example, but the head is at 500. I think my explanation is weird but I think I'm understanding it a bit better after re-reading 20 times. Pretty much, you have from 500-1000 to react to the incoming attack rather than 1003-1000. Not sure if I'm wrong or if anyone else will understand what I'm trying to say, even I'm confused reading it.