That link says nothing about converters performing badly due to vibrations.
Roy Gregory of Nordost and Steve Elford of Vertex AQ gave a PPT presentation at the Rocky Mountain Audio Fest I was at this weekend. They have engaged British defense contractor Acuity Products to create a new measurement methodology. Essentially they have measured time-based errors of CD players before and after three tweaks: better AC cables, better platform for vibration control, and Quantum conditioning which improves magnetic fields or something like that. The graphs they presented will soon be in a white paper and possibly an AES paper. The link above shows the improvement after the vibration control and two other tweaks. The text notes the improvement.
Quote:In this second graph we have reproduced the difference, or error graph, between the original track and the output of our CD player when it is just sat on the test bench and connected with ordinary leads. Again the scale is not easy to see but the amplitude of this error is actually about 8 percent of the amplitude of the music signal (the scale of the error graphs has been expanded so that you can see the graph easily).
Dmax, also read the link. It clearly shows the improvement of cables alone. In fact, they demonstrated the benefit of fine cables separately which is also how they conducted the tests.