Diecast-
Pam is an instructor and she's used to looking out for the welfare of others. I don't think the response was rude, just given with her instructor hat on. In that light it reads well and mirrors how I would have liked to respond.
Brackstone
First off- Congratulations! Now you're ready for days of riding unsupervised in a parking lot!

Before you know it, you'll be on the road.
In regards to braking, you'll definitely want to work on that before considering hitting a major road. Obstacles are everywhere and that's one of your best weapons in not hitting them.
When you're practicing braking remember it's a progressive squeeze. By the time you come to a stop you want to be pulling that lever as far as you can towards the handlebar.
Start with slow stops so you don't make the mistake of "grabbing" all that brake at once. Take your time but practice having the lever all the way in by the time you come to a stop. Then pick it up.
Give yourself a marker to aim for like in the course so you have a reference point from where you started to stop. Once you've come to a complete stop, squeeze the brake lever and see if you have any brake left. If you did, ask yourself what that braking power does for you at a stop. Wash, rinse repeat.
Do yourself a favor and pick up a can of tennis balls, cut them in half to make 6 bright weather/wind resistant cones and then start ~page 58 of this manual in a parking lot.
Practice Exercises
Once you've mastered those exercises try to make them harder (smaller areas, cones further offset in weaves and/or closer together etc). You want to become proficient at these until your bike feels more of an extension of your body. Eventually once you find a nice quiet street you'll want to practice some quick stops and swerves at higher speeds to get a feel for it.
Remember, like everything else start small and slowly work your way up.
I like to practice my parking lot exercises at least once a month outside of teaching classes. Mine are much harder than MSF exercises but I've taken the time to reach that level.
If you have any questions or need help with anything I'm sure your MSF instructors would love to help you. If you can't reach them, feel free to use this site and myself as a resource
Best Regards,
Ste