Here are the graphs direct from the survey site. Feel free to compare / contrast with those in Part II in the "Demographics" section.
So... How "confident" were they of the answers picked?
In summary, this demographic doesn't look very different from the general group of all respondents - perhaps proportionally more headphone listeners. Remember however that I was not able to find a significant improvement in general accuracy of identifying 24-bit audio comparing all the headphone-using respondents in the overall group.
Of interest also was the fact that the average cost of the hardware used by these respondents was no higher than that calculated for the total group.
Although this subgroup was accurate in their choice of which sample was the 24-bit audio, confidence overall remained relatively low with 20-25% admitted to being "guesses".
Part III: SUBJECTIVE COMMENTS & FINAL THOUGHTS