In this case, Draco is perceiving himself as acting faster thoughts, even though what it really is is a lack of hesitancy. This perception can cause trouble. Likewise, Harry perceives himself as being calmer and more in control, but what's really happened is that the potion's removed some of his more troublesome emotions.

Ah, thanks. I'll probably correct that phrasing.

Cordelia wants personal revenge as well as to ensure that Diggory becomes Minister.

I'm glad you enjoyed it.