"Audiophile Grade" Ethernet Switches - The new generation

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Hello Alex,

The trouble with the folks at AudioScienceReview is they do not understand, nor do they seem interested in learning about, the underlying issues of how common-mode deterministic jitter propagates in audio systems--including on packet-data interfaces such as Ethernet and USB—and thus induces voltage-change noise on ground-planes PCBs and chips, resulting in movement of clock thresholds.

For the benefit of those of us who would like to understand and learn, please can you give a technical definition of common-mode deterministic jitter (I understand each of those terms on their own but haven't seen them all in that combination before), and explain how its effects may be objectively observed in a streaming DAC?  That would be most helpful, thanks.