Re: am I the only one who DIDN'T think Nicholson nailed joker??
1. You make it sound like if it's dialogue, it's exposition.
2. You make it sound like all exposition is inherently a bad thing.
And you'd be wrong on both accounts. Alfred's wikipedia summary of Bane's history, now that's bad exposition, no two ways about it.
But the Ramirez quotes? They're exposition done with excellence. They're lines that aren't given a big a spotlight, they're peppered into a sequence that is about something else (Ramirez wondering why Batman doesn't show up, Harvey and Gordon arguing about Lau) and so you don't have time to stop and think about them. But if you're paying attention (which it sounds to me like you weren't) they're still in the back of your mind so that when the reveal that Ramirez is on the take comes, it doesn't feel like it came out of nowhere.
That is great exposition.