Every time I see this part when Miranda calls Andrea fat, I can't help laughing!
You think that's being cunty? I guarantee you most folks occasionally have to keep up with gratuitous actions/comments like that not by their boss but by their neighbors, coworkers, classmates, strangers, etc. Sad but true!
I find the "cuntiest" attitudes when Emily (Miranda's first assistant) feels schadenfreude when Andy is humiliated by their boss.