As a matter of fact, yes.
In the context of using a competent receiver with a Reon chip (which was the discussion), the receiver can perform the upscaling function as well or better than the other devices. Upconverting at the point where the audio is separated from the video may help to keep the audio and video synchronous, or reduce the need for audio delay while video processing is taking place. Also, if the receiver is at least equally competent to the other devices, it's probably more convenient for most users to setup the receiver to upconvert all sources and to switch audio and video sources together in the receiver. Basically, if you have a competent upconverting receiver as your hub, you may as well use it.
Now I'm thinking "Damn, I should have taken notes", but that's not really banquet etiquette. I think I got the gist of it, but I'm sure there's more to it that I either failed to comprehend or failed to remember.