Not sure it's a marketing ploy, its fairly clever technology going on. Effectively they are saying that the peak at the front of a note is important so you get a 500w or 700w or whatever peak, and then they blend a compressed feed in with your dry signal - which makes the whole thing sound louder. My guess would be live that the sound in the audience or to the desk would be quote good/ok, but for the player I personally need to hear the high transients of the notes in order to lock in with the drummer, I've played other setups where I've heard a very compressed foldback sound with no amp sound and I struggled