nah i was in the most profitable agency for a year, i know what i get and know what other girls get (far better than you would) some girls do make more than me, im staggered when i hear a girl say her anal rate (again something ive heard first hand countless times) and its a crazy number i would never ask for. (or get)
Im sure there are a few girls who ask for more to do IR or companies that will throw a lot of money at them to do it, but its not the standard. that in mind first IR's catch a pretty penny, but thats it.