Anyone ever heard of Martin Amis and Pat Kavanaugh?
Donna Tartt and Binky Urban? Sounds like the characters in a film from the 1980’s with Yuppie gals drinking Wine Coolers while they watch Dynasty on TV.
Personally, I’d never drop an agent nicknamed Binky. Because I’d love to get out of boring conversations by saying, “Sorry, but I’ve gotta go now. Gotta call Binky.”
Never heard of any of these people
However, I do know there's a big difference between writing a novel and writing a screenplay. In a novel, you have to use words to describe something that a visual image can convey much more easily. Conversely, in a novel you can let the reader inside the character's head, which is very difficult in a screenplay. Should one of my novels ever get picked for a movie, I'd gladly turn the writing of the screenplay over to a professional. My guess is that the writer involved here is just being petty.