That's what the debate is about.
We are not talking about connecting the iPod to the headphone jack of the receiver but rather using the headphone jack of the iPod vs buying the doc, placing the iPod in the doc, and using the doc's line out to connect to the receiver.
I didn't buy the doc and my experience so far matches bigpapa - you have to turn the iPod volume to max and also turn the receiver volume way up.