I won't go back through the archives to see whether you are a rat or not
I think you handled this well, personally. I know a lot of coaches that would've eaten this new guy's lunch, but you didn't. And while I am lucky to work with a select handful of experienced partners, new people need to start somewhere.
U1 probably could've been more diplomatic, but there comes a point where the only thing that doesn't throw a partner (who's gone back for seconds with the pooch) under a bus is complete silence.
A handful of college coaches around here coach first. While unusual, it's no big deal.