That's interesting, but not uncommon. Hiss at maximum gain is not unusual or even rare, depending on how much excess gain a system has. A more useful figure is noise (hiss) at a usable gain setting, say noise level while listening to loud music. Every system I've ever had exhibited some noise at max gain, but never any significant amount at a gain setting that would equate to music at 100 db, or even 115 db. That would mean peaks of 25dbw with 90 db/watt speakers, or approximately 350 watts.

I think that's what some 950 users are hearing - noise at an otherwise useful gain setting. I suspect the '11' mark on the Marantz above is well into clipping, and thus not really useful.