+1 on this wording. 

A possible source of confusion here is that when multicast is happening, it would be the same for current subscribers. This does not require replay behavior. In other words, at a given point in time if there are 3 subscribers, those 3 should get the same messages. Some time later when a 4th joins, going forward they will get the same, but the 4th will not get the same sequence as the previous 3 if you account for all time.

This wording could be misinterpreted in light of this.