Deborah Tannen

Today a speaker gave a talk that was pretty interesting, about gender and siblings, and the way males and females talk to each other. Her name is Deborah Tannen, she has a lot of books out, one of her books was on the NY Times bestseller list for many years.
In her book "You're wearing that? Understanding Mothers and Daughters in Conversation", she says that mothers should avoid discussing weight, clothing and hairstyles unless ABSOLUTELY necessary (would you want anyone critiquing you in those areas, especially if the advice was unsolicited)?
I am going to check out some of her books from the library and see if they are worth reading, they seem interesting.