I think it also helps that the top teams in the dance discipline are relatively older than in the other disciplines. They have more experience at life in general but also in the sport, they've seen more and have been through more, and specifically in Montreal they all seem to take full advantage of the cultural experiences the city offers (it's truly an amazing city).
I also think that the fact I.AM seem to give the skaters a lot more input, control, and autonomy over their careers plays a big part in preventing bitterness towards the coaches - when you are just as responsible for your training, your material, and your packaging it's harder to blame the coaches when things don't go as well as you have hoped.
And finally, all three of the main coaches (Patrice, Romain, and especially Marie-France) strike me as "no BS" coaches, and I doubt they'll tolerate juvenile drama at their caching school.