Is this word of mouth or through forums?
-pat
I have a hard time distinguishing between those two things

... but I posted something I read in passing elsewhere:
Onkyo Temperature Monitor
the search for my thread also brought up this other hit:
All the Onkyo "hidden" menus
What you bring up is always an intersting topic, in the broad scheme of AV. Whether its InTheIndustry going off on rebadged/rewrapped products, or the way features vs costs are handled in blu ray players. For instance, BD players have cheaper decoder chips than receivers since they don't need surround processing, post-processing, room correction, A/D conversion, but Denon uses the receiver chips nonetheless, adding unnecessary costs. Sometimes companies might do such things as they don't make the chips themselves, and have to figure out a way to get a product out on a timeline. The awaited Outlaws have dealt with this type of thing already.
But to be honest, I find many receivers to be pretty similar anyways, whether there are hidden features or not...