At 2am last night I sent in another version of my slides for my preliminary oral examination, and I haven't heard back from my advisor yet. I don't know if that's good or bad. He's giving a final exam today from 11:30am to 2:30pm, and if I were in his position I'd save my slides and read them during the final, so maybe that's what he's doing.
I think the slides I sent him last night are far superior to the slides I sent him last week, due in no small part to his criticisms and comments. I hope the current instantiation will be clear, detailed, and interesting enough to pass muster.
This just in: my advisor gave the go-ahead for my presentation Thursday before even looking at my newly-revamped slides. Yay!