Certainly when I used to use the E&G, double 170s would load all the way along at Queen Street. If your luck was in it would be a suburban or SPT unit at the front with no first class at the extreme ends. Single sideways seat behind the driver was the favourite on them.
First class is centre now and front or rear. At Haymarket loads piled on into the First class section or walk through it , not so much peace in that section in centre,