Her spiel with us wasn't that long and she explained that she requests silence because she personally finds discussions very distracting and it can cause her to lose her train of thought. I don't think that's an unreasonable request. It was done rather tactfully and she validated that 8am lectures probably aren't ideal. To be honest, her friendly warning was probably necessary because my cohort is extremely talkative and we've already had one lecturer storm out on us mid-session. I can see how someone might find it a tad condescending, but I feel some of the things I have read on this forum are a bit of an exaggeration. Maybe it's just because I've had a tonne if teachers from school walk in and demand that they deserve respect. I'm also aware I've only had her for one hour and that things might change over the course of the week.
I think this is just a case of your learning style and study technique clashing with a particular mode of teaching. Personally, I don't mind it because it means I actually have something where I can test my memory skills and understanding of the content we've learned.
It's not my intention to try and disqualify your personal feelings about her haha. I just got a really negative impression from someone who so far hasn't been bad at all (she's actually been relatively funny). I guess this goes to show just how differently we all learn! 
And to be quite honest, Stick, it's fantastic that you like her. In my cohort, there were quite a few people put off by her. Others didn't mind her, but there was a lot of negative feedback coming through about her. I'm glad she's toned down the spiel at the start though haha. I didn't mind so much that she asked us to be quiet, that's a reasonable request, it was the fact that she had outlined a punishment, which was quite a harsh one, and seemed to hang it over us the whole time.
I guess that's true about the filling in. I've never liked it, but again, a lot of the feedback suggested that it wasn't taken very well. With that said, you're right to point out that other people like learning that way.
More lecturers need to put their foot down about talking. I am so bloody tired of lecturers who just keep going when half the room is talking at normal conversational volume as if it isn't happening. I don't know how they even keep lecturing to be honest because I certainly can't concentrate. It drives me nuts that lecturers just say "well if they talk and miss out its their loss" when really it's the loss of all the diligent people too who are trying to listen but can't.
The last point is very, very true (and the problem I had with her threat!). Although, a teacher once pointed out to me that if you're speaking in front of people, and they're not listening, you shouldn't be asking what's wrong with them, rather, you should be asking what's wrong with your presenting. Not saying I agree with that, but it is food for thought.