You replied too damn quickly; I was just about to come back and edit that post.
I just ran into an old friend on the Citadel, and I was presented with dialogue choices for almost every time Shepard needed to say something, so it looks like perhaps the frequency of choices is on an increase.
Yep. It looks like I spoke too soon. There's quite a few dialogue choices opening up now.
Has anyone played the DLC missions yet? I'm trying to decide if I want to pick it up.