If TMM was released today, it would probably get a had R because of someone in the background smoking. I'm sure even the references to champagne would get it a freakin' PG-13. I love these moral panic stories where some antsy pants parental group with too much time on their hands says that "today's PG-13 movies are yesterday's R rated movies" because they get away with one or two things. Yet, the list of things that give a film a hard R grow every day. The Wolverine, rated PG-13, had more discretion shots when Wolverine stabbed a guy with his claws than a TV Y7 cartoon show.
Also, I love how they ignore that today's PG films are yesterday's G's. Marketing standpoint or not, every "PG" movie I've seen in recent memory that wasn't Rango was perfectly fine for a preschool audience.