Oh, yes. And Draco on the potion is far from as brilliant as he believes himself to be.

Draco can read people better- tell their emotions and reactions. What he can't deduce is the motivation behind their actions. So he knows Cordelia was caught off-balance, but he's forgotten that there' could be more than one reason for that. And the threat she presents may not come from any direction he anticipates.

I teared up when I wrote Hermione's line. I am such a sap.

Yes, I am.