sushi,
I tend to agree with JohnK and Semi with their lines of thinking.
The individual has not provided very much detail on exactly what was tested making it difficult to comment on his opinions.
From my limited testing when searching for cdps, my wife and i could not hear any difference b/w 2 models (Panasonic and Hitachi), nor b/w the analog and digital when using the Onkyo 797 receiver.

"Those who preach the myths of audio are ignorant of truth."