Congrats on the FAST leg. From what I've heard, that is a very large, busy trial that is definitely more than enough to make baby dogs go over the top. I think Sting held up very well in such an environment.
Jen Pinder has always kind of scared the crap out of me.

I've found her to be incredibly intimidating in a trial setting and I've been in a quite a few trials with her.
Then I signed up for the Mary Ellen Barry/Jen Pinder handling seminar after the MadCo trial because I think Mary Ellen is brilliant and know she does a great job working with small dog people as well as the bigger ones. Half of this seminar was being given by Jen Pinder and I almost didn't sign up for it because of it.
Jen is a completely different person during a seminar though. Yes, she still has that 'tough girl' way about her that I think is just her personality, but she was incredibly nice to all the dogs and handlers. I was so ridiculously nervous going into the seminar sessions with her, but she gave me some amazing advice tailored to Bella and was very encouraging/nice.
Experiences like this have kind of taught me not to judge the 'big name' handlers on how friendly they are at trials because I think most of them are just trying really hard to focus on their runs.
For example, Susan Garrett can seem quite unfriendly at a trial, but I know from fellow agility friends who have taken seminars with her that she is actually a nice person who treats her dogs fairly.
On the other hand, there is another big name handler that I see quite often who isn't 'friendly' at a trial, but I would never take a seminar from her because of my observations of her interactions with her dogs....but I digress....
Now I'm not saying that it's expected to have these 'big-name' handlers who aren't very friendly at trials, but just don't discount training with them in a non-trial setting because you might miss out on some great experiences. I came really close to missing out on one myself.