Yes, I was very skeptical at first. I have a MSEE degree, and spent half of my life (prior to audio) designing microprocessors, and software (C++, Java, client/server, app server, etc), you can say that I am a hard core engineer. I find it hard to explain from digital logic.
But all our ears don't lie. All of us who have heard it were very surprised. There are two explanations:
1. Network performance - this is easy to understand that when network packets do not need to be resent, multi-zone streaming will perform better
2. The noise in the network affected the audio components.
There was a blind test using Bonn N8 and Omnia SW-8 in a private review in UK for the purpose of finding out a) if there is a difference with and without the enhanced switch, and if SW-8 has any difference from N8 (afterall, both uses exactly the same circuit board). It was a big surprise that SW-8 consistently offer better sound for the audio system.
Order one from your dealer and give it a try. For US customers, you can order from your dealer or online store (sonicunity.com just added this item, not sure if it is available on Amazon.com or other online dealers). Check with your dealer if you can return for a refund if you can't tell the difference.